4 cost
CRIT Rate / CRIT DMG
3 cost
Fusion DMG
3 cost
Fusion DMG > ATK%
1 cost
ATK%
1 cost
ATK%
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Last updated: 22/October/2026
Best guide and build for Galbrena from WW (Wuthering Waves). Galbrena is a 5★ rarity character from the 
Fusion element who uses the Pistols type weapon.
Galbrena has at least one video guide available:
Last review update
Patch 3.7
Last major build/calcs update
Patch 3.0
Last profile update*
22/October/2026
*Profile update means smaller edits to echoes, stats, synergies or teams that don't require new calculations.
To learn more about Galbrena check the sections below. Use the tabs to quickly switch to the kind of information you're looking for.
Profile
Slayer's Trigger
Basic Attack
Perform up to 4 consecutive attacks, dealing Fusion DMG. Basic Attack Stage 1 to 3 DMG are considered as Heavy Attack DMG, and Basic Attack Stage 4 DMG as Echo Skill DMG.
Press Normal Attack right after performing Basic Attack Stage 4 to perform Basic Attack Stage 2.
Heavy Attack - Volley of Death
Consume STA to attack the target and perform up to 3 consecutive attacks, dealing Fusion DMG. Stage 3 DMG is considered as Echo Skill DMG.
Press Normal Attack right after performing Heavy Attack - Volley of Death Stage 1 to perform Basic Attack Stage 2. Press Normal Attack right after performing Heavy Attack - Volley of Death Stage 2 or 3 to perform Basic Attack Stage 3.
Mid-air Attack - Ashfall Barrage
While in mid-air, press Normal Attack to consume STA to perform a Plunging Attack, dealing Fusion DMG, considered as Heavy Attack DMG.
While in mid-air, hold Normal Attack to continuously consume STA to launch a barrage of shots at targets below, dealing Fusion DMG, considered as Heavy Attack DMG. If Galbrena does not land when interrupted during the barrage, she cannot immediately cast this skill again. Release Normal Attack during the barrage to cast Plunging Attack.
Press Normal Attack right after casting Plunging Attack to cast Basic Attack Stage 3.
Dodge Counter - Blood for Blood
Press Normal Attack right after a successful Dodge to attack the target, dealing Fusion DMG, considered as Heavy Attack DMG. Press Normal Attack right after casting this skill to cast Basic Attack Stage 4.
Edge Transcended
Resonance Skill - Encroach
Dash forward and leap into the air. Flip backward upon hitting the target, dealing Fusion DMG, considered Heavy Attack DMG.
Resonance Skill - Ascent of Malice
Upon reaching 100 points of Sinflame, Resonance Skill is replaced with Resonance Skill - Ascent of Malice.
Slash at enemies with her wings, dealing Fusion DMG, considered Heavy Attack DMG. Upon casting this skill:
Galbrena enters Demon Hypostasis.
Sinflame is converted into an equivalent amount of Purging Flame.
Can be followed by Basic Attack - Seraphic Execution Stage 2.
Hellfire Absolution
Attack the target and deal Fusion DMG, considered Echo Skill DMG.
Gain 85% DMG Multiplier increase for Basic Attack - Seraphic Execution, Heavy Attack - Flamewing Verdict, Mid-air Attack - Hellsent Barrage, and Dodge Counter - Purgatory Scourge for 14s while in Demon Hypostasis.
Press Normal Attack after casting Resonance Liberation to cast Basic Atttack Stage 2. While in Demon Hypostasis, cast Basic Attack - Seraphic Execution Stage 2 instead.
Can be cast in mid-air close to the ground.
Beyond Threshold
Threshold State
By default, Galbrena is in Threshold State, and in this state, she accumulates Afterflame and Sinflame.
Demon Hypostasis
While in Demon Hypostasis, Basic Attack, Heavy Attack - Volley of Death, Mid-air Attack - Ashfall Barrage, Dodge Counter - Blood for Blood, and Resonance Skill - Encroach are replaced with Basic Attack - Seraphic Execution, Heavy Attack - Flamewing Verdict, Mid-air Attack - Hellsent Barrage, Dodge Counter - Purgatory Scourge, and Resonance Skill - Ravage, which consume Purging Flame on hit.
While in Demon Hypostasis, every point of Afterflame increases the DMG of Basic Attack - Seraphic Execution, Heavy Attack - Flamewing Verdict, Mid-air Attack - Hellsent Barrage, Resonance Skill - Ravage, and Dodge Counter - Purgatory Scourge by 1.5%, up to 60%, which is removed upon exiting Demon Hypostasis.
When Purging Flame depletes or after staying in Demon Hypostasis for over 50s, Demon Hypostasis ends automatically.
Basic Attack - Seraphic Execution
Perform up to 5 consecutive attacks, dealing Fusion DMG. Consume Purging Flame on hit. Stage 1 to 3 DMG are considered Heavy Attack DMG, and Stage 4 & 5 DMG Echo Skill DMG.
Press Normal Attack after casting Basic Attack - Seraphic Execution Stage 5 to cast Basic Attack - Seraphic Execution Stage 3.
Heavy Attack - Flamewing Verdict
Consume STA to attack the target and perform up to 3 consecutive attacks, dealing Fusion DMG. Consume Purging Flame on hit. Stage 3 DMG is considered Echo Skill DMG.
Press Normal Attack after casting Heavy Attack - Flamewing Verdict Stage 1 to cast Basic Attack - Seraphic Execution Stage 2.
Press Normal Attack after casting Heavy Attack - Flamewing Verdict Stage 2 & 3 to cast Basic Attack - Seraphic Execution Stage 3.
Mid-air Attack - Hellsent Barrage
While in mid-air, press Normal Attack to consume STA to perform aerial attacks, dealing Fusion DMG, considered Heavy Attack DMG. Consume Purging Flame on hit.
While in mid-air, hold Normal Attack to continuously consume STA to launch a barrage of shots at targets, dealing Fusion DMG, considered Heavy Attack DMG. Consume Purging Flame on hit. If Galbrena does not land when interrupted during the barrage, she cannot immediately cast this skill again. Release Normal Attack during the barrage to cast Plunging Attack.
Press Normal Attack after the Plunging Attack to cast Basic Attack - Seraphic Execution Stage 3.
Dodge Counter - Purgatory Scourge
Press Normal Attack right after a successful Dodge to attack the target, dealing Fusion DMG, considered Heavy Attack DMG.
Press Normal Attack right after casting this skill to cast Basic Attack - Seraphic Execution Stage 4.
Resonance Skill - Ravage
Dash forward and leap into the air. Flip backward upon hitting the target, dealing Fusion DMG, considered Heavy Attack DMG.
Consume Purging Flame on hit. Resonance Skill - Ravage and Resonance Skill - Encroach share a cooldown.
Hellstride
Press Dodge on the ground while casting Galbrena's own skills to cast Hellstride to deal a fixed amount of Fusion DMG, considered Basic Attack DMG that does not bear any effect from DMG buffs. Hellstride can trigger successful Dodges. Hellstride cannot be cast consecutively.
Casting this skill does not reset the attack cycles within a short period of time.
Burning Drive
Casting Intro Skill, Hellstride, Normal Attack - Seraphic Execution Basic Attack Stage 4, Resonance Skill - Encroach, Resonance Skill - Ascent of Malice, and Resonance Skill - Ravage increases Galbrena's resistance to interruptions and ATK by 20% for 4s.
Afterflame
Galbrena can hold up to 40 points of Afterflame.
While in Threshold State, Galbrena recovers 8 points of Afterflame when Resonators in the nearby team cast Echo Skill. Echoes with the same name can only trigger this effect once. This effect resets when Galbrena exits Demon Hypostasis.
All Afterflame is removed upon exiting Demon Hypostasis.
Sinflame
Galbrena can hold up to 100 points of Sinflame.
While in Threshold State, hitting an enemy with Basic Attack, Heavy Attack - Volley of Death, Mid-air Attack - Ashfall Barrage, Resonance Skill - Encroach, and Intro Skill - Hellflare Overload recovers Sinflame.
Oathbound Hunt
1 stack of Fated End is inflicted on the target when the following skills hit: Intro Skill, Basic Attack, Basic Attack - Seraphic Execution, Dodge Counter, Heavy Attack - Volley of Death, Heavy Attack - Flamewing Verdict, Mid-air Attack, Hellstride, Resonance Skill - Encroach, Resonance Skill - Ascent of Malice, Resonance Skill - Ravage and Resonance Liberation, up to 4 stacks.
Each stack Amplifies the DMG directly dealt by Galbrena's Normal Attack, Resonance Skill, Forte Circuit, Resonance Liberation, Intro Skill, and Outro Skill by 5% for 5.5s. The same type of skill can trigger this effect on the same target once every 5s.
Resonance Skill - Encroach and Resonance Skill - Ravage are considered the same type of skill.
Sin Feaster
Casting Basic Attack Stage 4, Basic Attack - Seraphic Execution Stage 5, Heavy Attack - Volley of Death Stage 3, and Heavy Attack - Flamewing Verdict Stage 3 recovers 10 points of STA.
Hellflare Overload
Attack the target and deal Fusion DMG.
Hold Normal Attack after casting this skill to cast Heavy Attack - Volley of Death Stage 2. While in Demon Hypostasis, cast Heavy Attack - Flamewing Verdict Stage 2 instead.
Press Normal Attack right after casting this skill to perform Basic Attack Stage 2, which is replaced with Basic Attack - Seraphic Execution Stage 2 if Galbrena is in Demon Hypostasis.
Ashen Pursuit
Attack the target, dealing Fusion DMG equal to 79.5%*3+556.5% of Galbrena's ATK.
Sequence Node 1
When casting Resonance Skill - Ascent of Malice, each point of Afterflame additionally grants 2% Crit. DMG to Basic Attack - Seraphic Execution, Heavy Attack - Flamewing Verdict, Mid-air Attack - Hellsent Barrage, Resonance Skill - Ravage, and Dodge Counter - Purgatory Scourge, up to 80%. This effect is removed upon exiting Demon Hypostasis.
While in Demon Hypostasis, Basic Attack - Seraphic Execution Stage 5, Heavy Attack - Flamewing Verdict Stage 3, and Mid-air Attack - Hellsent Barrage are immune to interruption.
Sequence Node 2
Burning Drive grants 350% more ATK Bonus.
Sequence Node 3
Resonance Liberation DMG Multiplier is increased by 130%.
Sequence Node 4
When Resonators in the team cast Echo Skill, all Resonators in the team gain 20% all-Attribute DMG Bonus for 20s.
Sequence Node 5
The DMG Multipliers of Resonance Skill - Encroach, Resonance Skill - Ascent of Malice, and Resonance Skill - Ravage are increased by 150%.
Sequence Node 6
Demon Hypostasis becomes Eternal Hypostasis. Eternal Hypostasis retains all effects of Demon Hypostasis.
Additionally, Eternal Hypostasis lasts, the DMG Multipliers of Basic Attack - Seraphic Execution, Heavy Attack - Flamewing Verdict, Mid-air Attack - Hellsent Barrage, and Dodge Counter -Purgatory Scourge are additionally increased by 60%.
When casting Resonance Skill - Ascent of Malice, for every 1 point of Afterflame consumed, Galbrena's Basic Attack - Seraphic Execution, Heavy Attack - Flamewing Verdict, Mid-air Attack - Hellsent Barrage, Resonance Skill - Ravage, and Dodge Counter -Purgatory Scourge gain 0.875% Fusion DMG Amplification, up to 35%, which is removed upon exiting Eternal Hypostasis.
CRIT DMG
ATK%
HPATK
DEF
Max Energy
CRIT RateCRIT DMG
Healing Bonus
Fusion DMGWhile the source of the materials can be quickly found in the game, when it comes Stone Rose you will have to gather them from the map. Check our Interactive map to find them quickly:
Review
Please keep in mind Wuthering Waves is a skill-based game and each character has a different playstyle, difficulty level and even special tricks and combos. Wuthering Waves is also a team based game and it's only by combining both these factors to the highest level a character can reach optimal performance.
Can play into both the Mono Fusion and Echo Skill DMG archetypes, giving her some decent teammate flexibility;
Does not need her Signature weapon at all. Phasic Homogenizer is totally fine as a replacement;
Outro being damage-only means she is fully Quickswap-friendly.
Her best team is Mono Fusion. Any more modern Fusion DPS than Galbrena can use those characters better than she can, because her raw damage numbers don’t compete;
Her other best team is Echo Skill DMG with Qiuyuan/Lucilla. Sigrika is a direct upgrade to Galbrena in all scenarios there, other than Aero RES;
TL;DR: Galbrena has no reason to exist on anyone’s account if you don’t already own her and want to find the best fit for your Echo/Fusion Supports.
Galbrena is a 5-star Fusion Pistol DPS who, despite what her weapon class would make you think, gets up close and personal with her targets to deal Fusion & Heavy/Echo Skill damage to them under her enhanced state called Demon Hypostasis. Accessing this state and optimizing its damage via Galbrena’s numerous self-buffs included in her kit is the key to unleashing her full potential.
Galbrena’s kit focuses around entering a stance called Demon Hypostasis. It allows her to cast massively enhanced attacks that deal the overwhelming majority of her damage at the cost of Forte points called Sinflame. They get converted 1 to 1 into Purging Flame which is then expended to cast her enhanced moves in Demon Hypostasis. As a result, the focus of her kit is generating her max of 100 Sinflame to then expend it after entering Demon Hypostasis, entered by casting her Enhanced Skill.
The amount of Sinflame currently generated is visible on her Forte bar, marked in blue outside of Demon Hypostasis. In Demon Hypostasis, only Purging Flame will be visible.
Via her Inherent Skills, Galbrena possesses Stamina recovery on a lot of her attacks, and a ramp-up DMG Amplify effect up to 20% which is easy to fully stack, as well as 20% ATK which will be up throughout most of her rotation. A lot of self-buffs make for a strong, self-sufficient kit.
Furthermore, she additionally possesses an extra Forte bar marked in red, and it stacks up to 40 points. It is called Afterflame, and it replenishes by casting Echo skills, at a rate of 8 points per. This increases the DMG Taken of enemies during Demon Hypostasis by up to 60% (1.5% per point).
The above is especially important because DMG Taken (also known as Vulnerability) is a multiplier very rarely seen in character kits (mostly high Sequences like Cartethyia’s and Phrolova’s, and Qiuyuan’s Forte buffs). In most cases, it is rare enough to be considered a completely unique multiplier that buffs overall damage by whatever percentage is indicated. In other words, Galbrena’s damage increases by up to 60% with multiple Echo skill casts on the team (in her Mono Fusion team, this will typically not be maxed out and be left at 36%, but will go up to the full 60% with Qiuyuan or Lucilla).
And for those who are curious: DMG Taken is the opposite of DMG Reduction observable in Tower of Adversity. They interact with one another directly and are considered the same damage multiplier (they just increment as positive DMG Reduction or Negative DMG Reduction = Vulnerability).
Outside of Demon Hypostasis, Galbrena will want to execute a mix of Heavy and Basic Attacks because they replenish her Forte gauge the fastest. As a result, we can exploit the following during her rotations:
Intro leads into Basic Attack 2;
Heavy Attack 3 can be Dash Cancelled when fired while retaining full damage and Forte generation;
Dodge Counter leads into Basic Attack 4 (situational).
Finally, her Ultimate increases the DMG multiplier of all attacks in Demon Hypostasis by 85% which means it is necessary to cast before doing any attacks in Demon Hypostasis, because this buff represents a massive damage boost. However, the 20% DMG Amplify from her Inherent skill should be fully stacked up before using it to maximize damage (simply doing Intro + Basic Attack + Enhanced Skill is sufficient!)
During Demon Hypostasis, Galbrena only has her Basic Attack and Dodge Counter that she should worry about in order to fully expend her Forte gauge. There are 4 different properties to note here:
Ultimate leads into Basic Attack 2;
Basic Attack 5 leads into Basic Attack 3;
Basic Attack 3 can be Dash Cancelled at the end of the animation to save minimal time, Basic Attack 5 can be Dash Cancelled as soon as the enemy is hit by Galbrena’s kick to save a lot of time;
Dodge Counter leads into Basic Attack 4.
All of these properties are used in her rotation to skip out on the weak Basic Attack 1 and only focus on the much stronger Basic Attacks 3, 4 and 5 which have much higher damage values than the first two. Additionally, the Dodge Counter is really strong and for all intents and purposes serves as a Basic Attack 3 with higher damage. It can be quite advantageous in the right situations. Starting from max Forte, 2 Dodge Counter combos or 2 full Basic 3,4,5 combos can be executed (alongside a Basic 2 to start with).
Galbrena is a very simple Basic Attack spam character, whose only real damage ceiling improvements reside in her rotation outside of Demon Hypostasis - where Heavy Attacks do find some use, and her Forte gauge can be generated before Introing into her in certain teams, particularly those involving Lupa to nearly immediately go into Demon Hypostasis after Intro and save time.
Beyond this, she has very little intricacies to her kit and as a result presents herself as a decent Fusion damage dealer with decent teams. But that’s all she is: a decent character all around. Galbrena faces issues in endgame content generally by a lack of damage numbers to keep up with the modern 3.x cast. It’s still quite possible to clear with her, particularly in Quickswap, but generally Galbrena is behind the modern damage dealers and it shows. She was at her prime in version 3.0, when Mornye and Phasic Homogenizer both released to give her a new best team alongside Lupa and a fantastic alternative to her Signature, however since the release of Aemeath right after that, in the Fusion DPS department she was quickly outshined for Lupa teams, or at least Mornye teams since Aemeath’s own best team uses her and Lynae. Additionally, Sigrika came out as a new best user of Qiuyuan.
While Galbrena is decent in both WhiWa and ToA and can see acceptable results, she generally has all of her best teammates constantly stolen from her by damage dealers with simplt higher baseline numbers, that operate in the same niche that she does. Lucilla is the latest expansion to the Echo Skill damage engine that Galbrena can make use of, but she is no upgrade to Qiuyuan as he gives slightly less specialized buffs than Lucilla, and Galbrena deals 1/3 Heavy Attack damage, which Lucilla does not help with in the slightest.
In conclusion, Galbrena used to be one of the strongest damage dealers when she released, but since then got outshined rather quickly. Landing on the tail end of 2.x damage dealers, the newest generations of damage dealers that came since version 3.1 quickly stole her best teammates to take them to new heights, both in Mono Fusion and in Echo Skill damage, rendering her quite skippable overall for new players, as she remains usable for players who already own her for now.
Build
The percentages show the performance of the weapon based on calculations, but in some cases, some weapons might provide additional QOL that can't be quantified and it would push that weapon ahead of others in the priority (and in those cases, we would put that weapon higher).
Galbrena calculations were done using added buffs from the following teammates:
Lupa + Wildfire Mark + 
Flaming Clawprint
Mornye + Starfield Calibrator + 
Halo of Starry Radiance
100.00%
91.80%
85.70%
84.90%
83.00%
80.20%
77.50%
71.50%
68.30%
100.00%
Increases the CRIT Rate of Echo skills and Heavy Attacks and increases Fusion DMG Bonus when both effects are active. This makes it the best bundle of stats for Galbrena, who is the only one able to use this Echo set effectively.
Best combined with your choice of:
Molten Rift
Flaming Clawprint
Trailblazing Star
Chromatic Foam
Endless Resonance
Reel of Spliced Memories
Moonlit Clouds
Empyrean Anthem
Tidebreaking Courage
Below you can find Main Echo options:
Substats: Energy Regen (Until Satisfied) > CRIT Rate = CRIT DMG > ATK% > ATK > Heavy Attack DMG%
All recommended endgame stats portray a fairly good quality endgame build as a goal to aim for on most characters. However, don’t treat this as an end-all-be-all, and more of a suggestion.
All stat recommendations are given at S0 for 5-stars, S6 for 4-stars, and free characters (unless specified otherwise), based on total stats in the in-game stat-screen with the character out of combat but also active in the party (and hence some buffs may or may not apply). Any other precision may be directly specified. If not specified, Energy Regen requirements are estimated in the character’s best team.
HP: 14500+
DEF: 1100+
ATK: 1900-2100+
CRIT Rate: 60-80% (before Echo set bonuses)
CRIT DMG: 230-270%+
Energy Regen: 110-125%
Lower end was estimated in a Mono Fusion team, higher end is for more general use.
Fusion DMG Bonus: 40-70%+
Below you can find the order of leveling the abilities for Galbrena.
Forte Circuit
Res. Liberation
Basic Attack
Res. Skill
Intro Skill
Skill and Intro can be skipped when levelling to save on resources at a minimal damage loss.
Gameplay and teams
The focus of Galbrena’s kit lies on building her 2 Forte resources - Afterflame (in red) and Sinflame (in blue) - to then use them during her Demon Hypostasis state (entered via her Enhanced Skill obtained by fully restoring her Sinflame bar).
To restore Sinflame, the most efficient ways are sometimes Heavy Attacks, but mostly Basic Attacks. Those will also be the core of her damage in Demon Hypostasis.
To restore Afterflame, it is dependent on Echo skill casts and that is solely provided by casting active Echo skills or having specific teammates like Qiuyuan, Lucilla and Phrolova who have additional attacks that count as Echo skill casts. This means we always want to cast Galbrena’s active Echo Skill before entering Demon Hypostasis to restore Afterflame and expend it during Demon Hypostasis to enhance Galbrena’s damage.
With these factors in mind, below is what her standard rotation may look like:
Without featuring any Quickswap, Galbrena can rotate like so:
Intro
Basic 2
Basic 3
Heavy 1
Heavy 2
Heavy 3 (Cancel animation on shot via Dash)
Dash: Hellstride
Heavy 1
Heavy 2 (Cancel animation as soon as possible via Skill)
Skill: Ascent of Malice (Cancel animation endlag via Ultimate)
Ultimate
Basic: Seraphic Execution 2
Basic: Seraphic Execution 3 (Cancel animation endlag via Dash)
Dash: Hellstride
Basic: Seraphic Execution 4
Basic: Seraphic Execution 5 (Cancel animation on kick via Dash)
Dash: Hellstride
Basic: Seraphic Execution 3 (Cancel animation endlag via Dash)
Dash: Hellstride
Basic: Seraphic Execution 4
Basic: Seraphic Execution 5 (Swap)
Outro
To extend her rotation by a bit over a second and deal some extra damage, Galbrena can utilize the same exact rotation concept as before but do 1 more Demon Hypostasis attack:
Intro
Basic 2
Basic 3
Heavy 1
Heavy 2
Heavy 3 (Cancel animation on shot via Dash)
Dash: Hellstride
Heavy 1
Heavy 2 (Cancel animation as soon as possible via Skill)
Skill: Ascent of Malice (Cancel animation endlag via Ultimate)
Ultimate
Basic: Seraphic Execution 2
Basic: Seraphic Execution 3 (Cancel animation endlag via Dash)
Dash: Hellstride
Basic: Seraphic Execution 4
Basic: Seraphic Execution 5 (Cancel animation on kick via Dash)
Dash: Hellstride
Basic: Seraphic Execution 3 (Cancel animation endlag via Dash)
Dash: Hellstride
Basic: Seraphic Execution 4
Basic: Seraphic Execution 5 (Cancel animation endlag via Dash)
Dash: Hellstride
Basic: Seraphic Execution 3 (Swap)
Outro
The main advantage in this rotation is all buffs are retained on the final Basic 5, including Outro buffs that would normally expire on swap, and buffs that apply only to the active character like Qiuyuan’s CRIT DMG & Echo Skill DMG Bonus buffs. Meanwhile, the final Basic 3 gets almost no buffs, as Galbrena executes a Seraphic Execution Basic while Demon Hypostasis has expired. It’s quite weak, but it’s the best you can get while keeping all buffs active on the final Basic 5 that actually deals good damage.
Dodge Counters actually aren’t a big deal for Galbrena to perform, as they are her highest damage multiplier in Demon Hypostasis and act as a significantly enhanced version of her Basic 3. Overall, if needed to execute, while they do extend her rotation time through having to dodge, they aren’t a big deal to perform.
Galbrena’s Ultimate could theoretically be used before her Enhanced Skill, however it deals a high amount of damage and as a result we want to stack up her 20% DMG Amplify effect from her Inherent Passive to optimize damage.
In regard to the above point, while Galbrena’s Basic Attacks before her Enhanced Skill can be performed before her Intro, one Basic Attack always needs to be performed to fully stack up this Inherent Passive effect in time for her Ultimate cast. However, to optimize team rotation time (this is particularly applicable with Lupa on the team since she has many Swap Cancel windows), Galbrena can and should ideally perform a Basic 2,3,4 combo before her Intro at minimum.
This allows her to cast Basic 2,3 after her Intro and proceed with her rotation as normal, though she can cast these two right before Introing in to get her full buffs and Sinflame charged up before her on-field rotation even begun. Note that Galbrena will always start from her Basic 2 if swapped from any character in combat, whether her Intro is available or not.
Qiuyuan 
Lucilla - Galbrena's best Echo Damage buffers that provide multiple Echo Skill casts to fill up her Afterflame gauge, and amplify her Echo DMG via their Outros and other passives/weapon effects. Qiuyuan overall wins out by a slight margin as he sports buffs that apply more to Galbrena's 1/3 Heavy 2/3 Echo DMG split, whereas Lucilla really hones in on Echo DMG.Lupa 
Brant 
Mortefi - These 3 are the Mono Fusion team members for Galbrena, an archetype enabled by Lupa's insane buffs catered towards Fusion characters, particularly if the team is only comprised of them. Brant and Mortefi are great Outro buffers for Galbrena since they have 20% Fusion and 38 Heavy DMG Amplification respectively. Brant has higher personal damage which makes him perform at higher investments, but Mortefi is a totally fine alternative, and can even be considered for F2P Galbrena teams. Mono Fusion enabled by Lupa is one of Galbrena's best teams, particularly in Whimpering Wastes, and is definitely worth trying out!
Phrolova 
Iuno 
Rebecca - Not Galbrena's best teammate choices, but in Galbrena teams Phrolova and Iuno respectively provide 25 and 50% Heavy DMG Amplification on their Outros, and they both deal very high personal damage. Phrolova is stronger than Iuno in the personal damage department and has an extra Echo Skill cast for Galbrena's Afterflame, so she tends to outclass Iuno for these reasons; however Iuno has a really easy rotation and extra healing if it is preferred. Rebecca is also a generalist Heavy DMG buffer with minimal upsides beyond that, but all of them can be worth considering if the above options are missing.Mornye 
The Shorekeeper 
Verina - These 3 are the best generalist Supports in the game. Mornye has a special synergy with Galbrena and Lupa because she enables Galbrena to work in a Hypercarry team while still sporting Lupa's full Mono Fusion buffs which makes her the best choice if that's available. Otherwise, Shorekeeper is amazing thanks to her massive CRIT buffs and other generalist buffs, then Verina is the most accessible and still very strong option if neither are available.Team #1: Best Team
Team #2: Echo Hypercarry Team
Team #3: Mono Fusion Alternatives
Brant is only stronger than Mortefi at a minimum of S0R1 with endgame-level Echoes. Mortefi can outperform him at lower investments.
Team #4: Alt Premium Teams
Phrolova is significantly stronger than Iuno here, making for a noticeable jump in power.
Team #5: F2P Team
Calculations