Rina Best Build Guide

Intro & Unique Mechanic

Rina is an Electric Support Agent who controls 2 flying Bangboos: Drusilla and Anastella, and her buffs are tied to their state.

Certain moves will place them out on the field, and while this is the case, Rina will share a portion of her PEN Ratio with all team members, as well as giving a scaling Flat ATK and DEF buff.

These Bangboo don’t last long though, and will quickly leave the field. To get around this, Rina can make use of her EX Specials, Chain Attacks and Ultimates to enter the “Spotless” state, commanding them to attack over 13 seconds, which prevents them from disappearing.

So Rina ends up being a rather simple Agent to use: build as much PEN Ratio on her as possible to max out her buff, then in combat swap into her for the Spotless state, then swap out, working her skills alongside Drive Disc and W-Engine effects to maximise her buff value.

Core Passive, Potential Awakening & Additional Ability

Rina’s Core Passive is where her PEN Ratio buff is loaded in: it’s a value of 25% of Rina’s PEN Ratio, +12%, with a cap of 30%. Levelling the A/C/E nodes also gives PEN Ratio as the standard stat bonus, so Rina can get:

• 14.4% from levelling her Core Passive

• 24% from a PEN Ratio D5

• 24% from a PEN Ratio W-Engine (Weeping Cradle)

• 8% from a 2-piece PEN Ratio set (Puffer Electro)

For a total of 70.4%. 25% of that is 17.6%, which then has 12% be added to it, leaving her at 29.6%, just shy of the 30% limit.

Her Potential Awakening is the missing piece, as it’ll provide 1.6% additional PEN Ratio to Rina, 25% of which is 0.4%, maxing out the buff. It’s here that her Flat ATK and DEF buff come from, as for as long as the Core Passive PEN Ratio buff is active, she will also give up to 576 ATK and 468 DEF to all allies.

This also scales, at a rate of 8 ATK and 6.5 DEF per 1% PEN Ratio. With Rina getting to 72% in PEN Ratio with the bonus from the Potential, that’s just enough to reach the limit on its buff too.

Since this is tied to the Core Passive effect, keep in mind that it’s only applied while Drusilla and Anastella are out on the field!

All attacks, with the exception of her hold Basic, “Shoo the Fool”, will place them, and they remain there for 5.5s even if Rina goes off-field, but their presence can be extended.

As for Rina’s Additional Ability, it demands the same Attribute or Faction Agents, and it increases the duration of Shock by 3s, while also increasing Electric DMG to all team members by 10% if there is a Shocked enemy on field.

This can be helpful for extending the uptime of ally Drive Discs, like Thunder Metal, and is a slight boost to her buff value in Electric teams, but isn’t significant enough to limit her to them, with most of her power budget being loaded on the PEN Ratio and Flat ATK/DEF buffs.

Basic Attack

Rina has 4 Basic Attacks. “Whack the Dimwit” is the regular string, being 4 attacks that do little of note.

“Shoo the Fool” is her hold Basic, and outside of certain niche scenarios, it’s best avoided. It will recall Drusilla and Anastella to Rina to do a small AoE attack. It has poor multipliers, and once recalled, the Bangboos will leave the field together with Rina unless another attack places them out again.

“Morning Cleanup” and “Midnight Cleanup” are Basics but those done by the Bangboos.

As previously mentioned, EX Special, Chain Attack and Ultimates will put Rina in the Spotless state, lasting 13s and being tracked via the bar underneath her portrait in combat.

While it’s active, Drusilla and Anastella will attack with Morning Cleanup every 2.5s, and build a stack of “Fright” up to 6. Every hit will reset their exit timer back to 5.5s after use, and they continue to attack even if Rina is using some of her other skills, like her regular Basic string.

Once 6 are reached, the pip at the end of Rina’s resource bar will glow, which indicates that their next attack is upgraded to Midnight Cleanup.

Given Spotless lasts 13s, the most stacks that can be built in one instance is 5, with around a 0.5s gap between the final attack and the state ending. 

This is visible on Rina’s resource bar, as it’ll turn from red to blue when there isn’t enough time left for another attack, meaning that multiple cycles of Spotless are needed to get to it.

It’s an empowered version that always deals Electric DMG and has better multipliers, but otherwise isn’t much different from the others, and has the same behaviour of resetting the exit timer.

All that matters is that the Bangboo keep attacking, as they remain on field to maintain Rina’s Core Passive and Potential buffs, while also triggering W-Engine effects.

Specials

Rina’s regular Special is unremarkable, sending out Anastella to attack enemies but with weak multipliers. It isn’t particularly fast, but can be used for Chain Attack triggers owing to having its Heavy Attack come early.

Her EX Special costs 60 Energy and is one of the ways to access the Spotless state. Prior to her Potential Awakening, it had a very delayed Heavy Attack, but this has been changed to trigger as soon as she fires it out. As with many other Support EX Specials, it also triggers a Quick Assist.

It sees frequent use owing to it being one of the ways to activate Moonlight Lullaby’s set effect and to keep her Bangboos out in the field.

Dodges & Assists

Her Dash Attack can be used as a way to deploy Drusilla and Anastella quickly into the field, as it activates quickly but has lingering multihits that keep the Bangboos out for a little longer.

Outside of that, none of her Dodges or Assists have redeemable qualities. Her Dodge Counter is middling, her Quick Assists are slow and she’s triggering rather than taking them, and she has an Evasive Assist - locking her out of parry mechanics.

Her Assist Follow-Up used to be the worst in the game, with the longest animation lock out of all Agents, but her Potential has partially fixed this, allowing for an early swap out right after its cast. 

Assists are going to be best given to other team members, but it isn’t the terrible skill that it once was, so there can be some use on giving it to her owing to its single Assist Point cost for extra Decibels.

Chain & Ultimate

Rina’s Chain Attack and Ultimate are both near exact copies of one another. She’ll launch Drusilla and Anastella forwards and trigger a Quick Assist. This is best taken, as the Ultimate has the added bonus of generating 10 Energy for the team and 20 for the next character to switch in.

It’s not as if Rina could do much, as during the attacks, Rina is locked out of most of her skills.

She can get around this by instantly recalling Drusilla and Anastella with her hold Basic, but this will also immediately cut the Chain Attack and Ultimate short, so it should be avoided!

Both moves will put Rina in the Spotless state, and while her Chain Attack may not see too much use, as double Chains on Attackers is often better, her Ultimate can be integrated into rotations for Moonlight Lullaby and Core Passive buff management.

Rina has an exceptionally simple gameplan: keep her Bangboos out for as much as possible to have her Core Passive buff up and be sure to enter the Spotless state as stun begins, since the 18ish seconds that the Bangboos will be out in the field for is enough to cover most stun durations.

There are optimisations that can be done. If the route allows for it, use her regular Basic or Dash Attack to deploy her Bangboos out to the field. Rina may occasionally have the time to use her EX Special for the Spotless state out-of-stun and still recover Energy in time for it, which can help with general uptime.

As Stun is about to begin, use her EX Special or Ultimate to enter the Spotless state, activate Moonlight Lullaby, and if applicable, maintain Weeping Cradle’s buff for the burst.

Since Weeping Cradle lasts 3s, there’s a 2.5s gap between it and the Bangboos leaving, so having Rina use her skills as late as possible is best, to ensure that as much of the stun duration is covered by the buff effect.

Once done, the cycle repeats, with skill expression manifesting in attempts to maintain as much uptime of the buff as possible in the out-of-stun period.