Skill Investment

Here's the explanation for all the numbers and colors used in the guide:

10/5/7 means upgrading Skill 1 to lvl 10, Skill 2 to lvl 5, and Burst Skill to lvl 7,
Yellow means the immediate investment when u get the unit. There are 3 reasons for this:

If the unit is Meta or High Priority, it will have a starting investment of more than 1/1/1 (such as 4/4/4) depending on what the unit provides.
If the unit is Medium or Low Priority, 1/1/1 will be mentioned, meaning no immediate investment is required, and you can invest in this character if you need to use it according to the priority listed.
If we deem that a unit does not have usable skills to be meta for any gamemode, no investment will be mentioned.

Blue means minimum investment to take advantage of the Nikke's skills. There are 2 reasons for this:

Sometimes, minimum investments are breakpoints such as for Noir or SAnis.
Sometimes, minimum investments are just the ideal way to progress to upgrade that unit, before moving on to Recommended and High.

Red means recommended investment for F2P players,
Purple means maximum recommended investment, in order to get the best out of the unit. You should only try to reach these investments if you have a surplus of Skill Books leftover.

More info:

The skill investment list below features a lot of Level 4 and 7 because they are easier to understand. Any higher levels will cost a new type of resource.
However, you may choose to upgrade to Level 5 if you need a stronger effect instead of 4, as the increase in Blue Manual cost from Level 4 to 5 is still low. The leap only starts from Level 6 onward.
There is also a leap from Level 3 to 4, so if you want to save a tiny bit of Blue Manuals, then leave at 3 instead of 4.

Priority explained:

Meta: Most Important Nikkes.
High: Good in various PvE content.
Medium: Good in at least one PvE content.
Low: Can perform well but not as good as other units / Situationally Meta / Old Meta
Very Low: Niche usage / Tribe Tower Units
Late Game: These nikkes need investments to reach their potential but are expensive to build. They should be invested after clearing Ch 23 Normal with mentioned priority.
PvP: These units are more used for PvP.

PVE investment

1/1/1 → 4/7/7 → 7/10/10 (→ 10/10/10)

PVP investment

1/1/1 → 4/7/7 → 4/10/10 (→ 7/10/10)

Priority

Low

PVE investment

1/1/1 → 4/4/4 → 7/7/7 (→ 10/10/10)

PVP investment

1/1/1 → 4/1/4 → 7/4/7 (→ 10/4/10)

Priority

Low

Ada Wong

PVE investment

4/4/4 → 10/4/4 → 10/10/7 (→ 10/10/10)

PVP investment

4/4/4 → 10/4/4 → 10/10/7 (→ 10/10/10)

Priority

High

Ade

PVE investment

1/1/1 → 1/5/1

PVP investment

1/1/1

Priority

Very Low

Ade: Agent Bunny

PVE investment

4/4/4 → 4/4/7 → 7/7/10 (→ 10/10/10)

PVP investment

4/4/4 → 4/4/10

Priority

High

Admi

PVE investment

1/1/1 → 1/1/5

PVP investment

1/1/1

Priority

Very Low

Alice

PVE investment

1/1/1 → 10/4/10

PVP investment

1/1/1 → 10/4/10

Priority

Meta (Late Game)

Alice: Wonderland Bunny

PVE investment

1/1/1 → 4/4/4 → 7/7/4 (→ 7/10/4)

PVP investment

1/1/1 → 4/4/4

Priority

High (Late Game)

Anchor

PVE investment

1/1/1

PVP investment

1/1/1

Priority

Anchor: Innocent Maid

PVE investment

1/1/1 → 4/7/4 → 7/10/7 (→ 10/10/10)

PVP investment

1/1/1 → 4/4/4 → 7/7/7 (→ 10/10/10)

Priority

High

Anis

PVE investment

1/1/1 → 4/4/4

PVP investment

1/1/1 (→ 4/4/4)

Priority

Very Low

Anis: Sparkling Summer

PVE investment

4/4/5 → 7/7/9 → 10/10/9 (→ 10/10/10)

PVP investment

4/4/5 → 7/7/9 → 10/10/9

Priority

High

Anne: Miracle Fairy

PVE investment

1/1/1 → 4/4/4 (→ 4/4/7)

PVP investment

1/1/1 → 4/4/4 → 4/4/7 (→ 4/4/10)

Priority

PVP

Arcana

PVE investment

4/4/4 → 7/7/4 → 10/10/4 (→ 10/10/10)

PVP investment

4/4/4

Priority

Medium

Aria

PVE investment

1/1/1

PVP investment

1/1/1

Priority

Asuka Shikinami Langley

PVE investment

1/1/1 → 4/4/7 → 7/7/7 (→ 10/10/10)

PVP investment

1/1/1 → 4/4/7

Priority

Meta

Asuka Shikinami Langley: Wille

PVE investment

1/1/1 → 7/4/4 → 10/7/7 (→ 10/10/10)

PVP investment

1/1/1

Priority

Meta

Bay

PVE investment

1/1/1 → 4/4/4

PVP investment

1/1/1 → 4/4/4

Priority

Low

Bay (Treasure)

PVE investment

1/1/1 → 4/4/4

PVP investment

1/1/1 → 4/4/4 → 7/4/4

Priority

Very Low

Belorta

PVE investment

1/1/1

PVP investment

1/1/1

Priority

Biscuit

PVE investment

1/1/1 → 4/4/4 → 4/4/7 (→ 4/4/10)

PVP investment

1/1/1 → 4/4/4 → 4/4/7 (→ 4/4/10)

Priority

Medium

Blanc

PVE investment

1/1/4 → 4/4/7 → 4/4/10

PVP investment

1/1/4 → 4/4/7 → 4/4/10

Priority

Meta

Bready

PVE investment

1/1/1 → 4/4/4 → 7/7/7 (→ 10/10/10)

PVP investment

1/1/1 →

Priority

High

Brid

PVE investment

1/1/1

PVP investment

1/1/1

Priority

Centi

PVE investment

1/1/1 → 4/4/4

PVP investment

1/1/1 → 4/4/4

Priority

Low

Cinderella

PVE investment

4/4/4 → 7/4/7 → 10/7/10 (→ 10/10/10)

PVP investment

4/4/4 → 7/4/7 → 10/4/10 (→ 10/7/10)

Priority

Meta

Claire Redfield

PVE investment

1/1/1

PVP investment

1/1/1

Priority

Clay

PVE investment

1/1/1 → 4/4/4

PVP investment

1/1/1 → 4/4/4

Priority

Cocoa

PVE investment

1/1/1 → 4/4/4

PVP investment

1/1/1

Priority

Very Low

Crow

PVE investment

1/1/1

PVP investment

1/1/1

Priority

Crown

PVE investment

4/4/4 → 7/7/7 → 10/10/10

PVP investment

4/4/4 → 7/4/7 → 10/4/10

Priority

Meta

Crust

PVE investment

1/1/1 → 3/3/3 → 4/4/4 (→ 5/5/10)

PVP investment

1/1/1

Priority

Low

PVE investment

1/1/1

PVP investment

1/1/1

Priority

D: Killer Wife

PVE investment

4/4/4 → 4/7/4 → 7/10/4 (→ 10/10/7)

PVP investment

4/4/4

Priority

Meta

Delta

PVE investment

1/1/1

PVP investment

1/1/1

Priority

Delta: Ninja Thief

PVE investment

4/1/1 → 7/3/3 → 10/3/3 (→ 10/4/10)

PVP investment

4/1/1 → 7/3/3 → 10/3/3 (→ 10/4/10)

Priority

Low

Diesel

PVE investment

1/1/1 → 4/4/4 (→ 4/10/4)

PVP investment

1/1/1

Priority

Very Low

Diesel (Treasure)

PVE investment

1/1/1 → 1/4/4 → 1/7/4 (→ 4/10/7)

PVP investment

1/1/1 → 1/4/4 → 1/7/4 (→ 4/10/7)

Priority

Low

Dolla

PVE investment

1/1/1 → 4/4/4 (→ 7/7/4)

PVP investment

1/1/1

Priority

Low

Dorothy

PVE investment

4/4/4 → 7/4/7 → 10/4/10 (→ 10/7/10)

PVP investment

4/4/4

Priority

High

Dorothy: Serendipity

PVE investment

4/4/4 → 7/7/7 → 7/10/10 (→ 10/10/10)

PVP investment

4/4/4 → 7/7/7 → 7/10/10 (→ 10/10/10)

Priority

Meta

Drake

PVE investment

1/1/1 → 4/4/4

PVP investment

1/1/1 → 4/4/4

Priority

Low

Drake (Treasure)

PVE investment

1/1/1 → 4/4/4 → 10/4/74 (→ 10/10/10)

PVP investment

1/1/1 → 4/4/4 → 10/4/7 (→ 10/10/10)

Priority

High

Ein

PVE investment

1/1/1 → 4/4/4 → 7/7/7 (→ 10/10/10)

PVP investment

1/1/1 → 4/4/4 → 7/7/7 (→ 10/10/10)

Priority

Medium

Elegg

PVE investment

1/1/1 → 4/4/4 → 4/4/7 (→ 7/7/10)

PVP investment

1/1/1

Priority

Low

Elegg: Boom and Shock

PVE investment

1/1/1 → 7/4/4 → 10/7/7 (→ 10/10/10)

PVP investment

1/1/1

Priority

Medium (PVP)

Emilia

PVE investment

1/1/1 → 4/4/7 → 4/7/7 (→ 7/10/7)

PVP investment

1/1/1 → 4/4/7 → 4/7/7 (→ 7/10/10)

Priority

Medium (PVP)

Emma

PVE investment

1/1/1

PVP investment

1/1/1 → 4/4/4 (→ 7/4/4)

Priority

PVP

Emma: Tactical Upgrade

PVE investment

4/4/4 → 7/7/7 → 7/10/10 (→ 10/10/10)

PVP investment

4/4/4

Priority

Medium

Epinel

PVE investment

1/1/1 → 4/4/4

PVP investment

1/1/1

Priority

Very Low

Ether

PVE investment

1/1/1

PVP investment

1/1/1

Priority

Eunhwa

PVE investment

1/1/1

PVP investment

1/1/1

Priority

Eunhwa: Tactical Upgrade

PVE investment

1/1/1 → 4/7/7 → 7/10/10 (→ 10/10/10)

PVP investment

1/1/1 → 4/4/4 → 4/10/4 (→ 4/10/10)

Priority

Low

Eve

PVE investment

4/4/4 → 10/4/7 → 10/7/7 (→ 10/10/10)

PVP investment

4/4/4

Priority

High

Exia

PVE investment

1/1/1

PVP investment

1/1/1

Priority

Exia (Treasure)

PVE investment

1/1/1 → 1/7/4 → 1/10/7 (→ 1/10/10)

PVP investment

1/1/1

Priority

Medium

Flora

PVE investment

1/1/1 → 4/4/4 → 4/7/7

PVP investment

1/1/1 → 4/4/4 → 4/7/7

Priority

Low

Folkwang

PVE investment

1/1/1

PVP investment

1/1/1

Priority

Frima

PVE investment

1/1/1

PVP investment

1/1/1

Priority

Frima (Treasure)

PVE investment

1/1/1 → 1/4/4 → 1/7/7 (→ 1/10/10)

PVP investment

1/1/1

Priority

Medium

Grave

PVE investment

4/4/4 → 7/4/7 → 7/4/10 (→ 10/7/10)

PVP investment

4/4/4 → 4/4/7 → 4/4/10 (→ 4/7/10)

Priority

High

Guillotine

PVE investment

1/1/1 → 4/7/4 (→ 4/10/4)

PVP investment

1/1/1

Priority

Medium

Guillotine: Winter Slayer

PVE investment

1/1/1 → 4/4/4 → 7/7/7 (→ 10/10/10)

PVP investment

1/1/1 → 4/4/4 → 7/7/7 (→ 10/10/10)

Priority

Low

Guilty

PVE investment

1/1/1 → 7/1/1 (→ 10/4/4)

PVP investment

1/1/1

Priority

Low

Harran

PVE investment

1/1/1 → 4/4/4

PVP investment

1/1/1 → 4/4/4 → 4/4/7 (→ 4/4/10)

Priority

Very Low (PVP)

Helm

PVE investment

1/1/4 → 4/4/4 → 4/4/7 (→ 7/7/7)

PVP investment

1/1/4

Priority

Medium

Helm (Treasure)

PVE investment

4/4/4 → 7/7/7 → 7/7/7 (→ 7/10/10)

PVP investment

4/4/4 → 7/4/4 → 10/7/7 (→ 10/10/10)

Priority

High

Helm: Aquamarine

PVE investment

1/1/1 → 1/4/1 → 4/7/4 (→ 4/10/4)

PVP investment

1/1/1

Priority

Low

Himeno

PVE investment

1/1/1

PVP investment

1/1/1

Priority

Isabel

PVE investment

1/1/1

PVP investment

1/1/1

Priority

Jackal

PVE investment

1/1/1

PVP investment

1/1/1 → 4/4/4

Priority

PVP

Jill Valentine

PVE investment

4/4/4 → 7/7/7 → 10/10/10

PVP investment

4/4/4 → 7/7/7 → 10/10/10

Priority

Low

Julia

PVE investment

1/1/1

PVP investment

1/1/1

Priority

Julia (Treasure)

PVE investment

1/1/1 → 4/4/4 → 7/7/7 (→ 10/10/10)

PVP investment

1/1/1 → 4/4/4 → 7/7/7 (→ 10/10/10)

Priority

Very Low

PVE investment

4/4/4 → 7/7/4 → 10/10/7 (→ 10/10/10)

PVP investment

4/4/4

Priority

Low

Kilo

PVE investment

1/1/1 → 4/4/4 → 4/4/7

PVP investment

1/1/1 → 4/4/7 → 4/4/10

Priority

Very Low (PVP)

Laplace

PVE investment

1/1/1 → 4/4/4

PVP investment

1/1/1 → 4/4/4

Priority

Very Low

Laplace (Treasure)

PVE investment

1/1/1 → 4/4/7 → 4/7/10 (→ 4/10/10)

PVP investment

1/1/1 → 4/4/7 → 4/7/7 (→ 4/10/10)

Priority

Medium

Leona

PVE investment

1/1/1 → 4/7/4 → 7/7/7

PVP investment

1/1/1

Priority

High (Late Game)

Lily

PVE investment

1/1/1

PVP investment

1/1/1

Priority

Liter

PVE investment

4/4/4 → 7/4/7 → 7/4/10 (→ 10/4/10)

PVP investment

4/4/4 → 4/4/7 → 7/4/10 (→ 10/4/10)

Priority

Meta

Little Mermaid (Siren)

PVE investment

1/1/1 → 4/4/4 → 7/7/7 (→ 10/10/7)

PVP investment

1/1/1 → 4/4/4 → 7/7/7 (→ 10/10/7)

Priority

Meta

Ludmilla

PVE investment

1/1/1 → 1/4/1

PVP investment

1/1/1 → 4/4/4

Priority

Very Low

Ludmilla: Winter Owner

PVE investment

4/4/4 → 7/4/5 → 10/4/10 (→ 10/7/10)

PVP investment

4/4/4

Priority

High

Maiden

PVE investment

1/1/1

PVP investment

1/1/1 → 4/1/4 → 7/1/7 (→ 7/4/10)

Priority

PVP

Maiden: Ice Rose

PVE investment

4/7/4 → 4/10/4 → 7/10/7 (→ 10/10/10)

PVP investment

4/7/4 → 4/10/4 → 7/10/7 (→ 10/10/10)

Priority

High

Makima

PVE investment

1/1/1

PVP investment

1/1/1 → 4/4/4

Priority

PVP

Mana

PVE investment

1/1/1 → 4/4/4 → 4/7/7 (→ 7/10/7)

PVP investment

1/1/1 → 4/4/4 → 7/4/4

Priority

Medium

Marciana

PVE investment

4/4/1

PVP investment

4/4/1

Priority

Medium

Mari Makinami Illustrious

PVE investment

4/4/4 → 7/4/7 → 10/7/10 (→ 10/10/10)

PVP investment

4/4/4 → 4/4/7 → 4/4/10

Priority

High

Mary

PVE investment

1/1/1

PVP investment

1/1/1

Priority

Mary: Bay Goddess

PVE investment

1/1/1 → 4/4/4

PVP investment

1/1/1

Priority

Medium

Mast

PVE investment

1/1/1 → 4/4/4 (→ 7/4/7)

PVP investment

1/1/1

Priority

Low

Mast: Romantic Maid

PVE investment

1/1/1 → 4/7/4 → 7/10/7 (→ 10/10/10)

PVP investment

1/1/1 → 4/1/1 → 7/1/1 (→ 10/1/1)

Priority

High

Maxwell

PVE investment

4/1/4 → 7/1/4 → 10/1/7 (→ 10/4/10)

PVP investment

4/1/4 → 7/4/4 (→ 10/4/4)

Priority

High

Mica

PVE investment

1/1/1

PVP investment

1/1/1

Priority

Mica: Snow Buddy

PVE investment

1/1/1 → 4/4/4

PVP investment

1/1/1 → 4/4/4 (→ 4/10/7)

Priority

Low

Mihara

PVE investment

1/1/1

PVP investment

1/1/1

Priority

Mihara: Bonding Chain

PVE investment

1/1/1 → 5/5/5 → 7/7/7 (→ 10/10/10)

PVP investment

1/1/1 → 5/3/3 → 7/5/5 (→ 10/10/10)

Priority

High (Late Game)

Milk

PVE investment

1/1/1

PVP investment

1/1/1

Priority

Milk (Treasure)

PVE investment

1/1/1 → 4/4/4 → 7/7/4

PVP investment

1/1/1 → 1/1/4 → 1/1/7

Priority

Very Low

Milk: Blooming Bunny

PVE investment

4/4/4 → 7/7/7 → 10/10/10

PVP investment

4/4/4 → 4/4/10 → 4/10/10

Priority

Meta (Late Game)

Miranda

PVE investment

1/1/1 → 1/4/4 → 4/4/7 (→ 4/7/10)

PVP investment

1/1/1

Priority

Low

Miranda (Treasure)

PVE investment

1/1/1 → 1/4/4 → 1/7/7 (→ 7/10/10)

PVP investment

1/1/1 → 1/4/4 → 1/7/7 (→ 1/10/10)

Priority

Low

Misato Katsuragi

PVE investment

1/1/1

PVP investment

1/1/1

Priority

Modernia

PVE investment

4/4/4 → 7/7/4 → 10/10/4 (→ 10/10/7)

PVP investment

4/4/4

Priority

Meta

Moran

PVE investment

1/1/1 → 4/4/4

PVP investment

1/1/1 → 4/4/4 → 4/7/7 (→ 4/7/10)

Priority

Low (PVP)

Mori

PVE investment

1/1/1 → 1/4/4

PVP investment

1/1/1

Priority

Very Low

N102

PVE investment

1/1/1 → 1/1/4

PVP investment

1/1/1

Priority

Low

Naga

PVE investment

4/4/4 → 7/4/7 → 10/7/10 (→ 10/10/10)

PVP investment

4/4/4

Priority

Meta

Nayuta

PVE investment

4/4/4 → 7/4/7 → 10/5/10 (→ 10/10/10)

PVP investment

4/4/4 → 7/4/7 → 10/5/10 (→ 10/10/10)

Priority

Meta

Neon

PVE investment

1/1/1

PVP investment

1/1/1

Priority

Neon: Blue Ocean

PVE investment

1/1/1

PVP investment

1/1/1

Priority

Nero

PVE investment

1/1/1

PVP investment

1/1/1 → 4/4/4 (→ 10/10/4)

Priority

PVP

Neve

PVE investment

1/1/1 → 1/4/1

PVP investment

1/1/1

Priority

Very Low

Nihilister

PVE investment

1/1/1 → 4/4/4

PVP investment

1/1/1 → 4/4/4

Priority

Very Low (PVP)

Noah

PVE investment

1/1/1 → 4/4/4

PVP investment

1/1/1 → 4/4/4

Priority

PVP

Noir

PVE investment

4/4/4 → 7/5/4 → 10/9/4 (→ 10/10/4)

PVP investment

4/4/4 → 7/5/4 (→ 10/5/4)

Priority

Meta

Noise

PVE investment

1/4/4 → 4/4/4

PVP investment

1/4/4 → 4/4/7 (→ 7/7/10)

Priority

Medium (PVP)

Novel

PVE investment

1/1/1 → 1/1/7 (→ 4/4/10)

PVP investment

1/1/1

Priority

Low

Pascal

PVE investment

1/1/1

PVP investment

1/1/1 (→ 4/4/4)

Priority

PVP

Pepper

PVE investment

1/1/1 → 4/4/4

PVP investment

1/1/1 → 4/4/4 → 4/4/7 (→ 4/4/10)

Priority

Low (PVP)

Phantom

PVE investment

1/1/1 → 4/4/4 → 7/7/4 (→ 10/10/7)

PVP investment

1/1/1 → 1/7/7 → 1/10/10

Priority

Low

Poli

PVE investment

1/1/4 → 4/4/4 → 4/4/7 (→ 4/4/10)

PVP investment

1/1/4 → 4/4/4 → 4/4/7 (→ 4/4/10)

Priority

Low

Poli (Treasure)

PVE investment

1/1/1

PVP investment

1/1/1

Priority

Low (PVP)

Power

PVE investment

1/1/1

PVP investment

1/1/1 → 4/4/4 → 4/4/7 (→ 7/4/10)

Priority

PVP

Privaty

PVE investment

4/1/1 → 7/1/1 (→ 10/4/4)

PVP investment

4/1/1 → 7/7/4 (→ 7/10/4)

Priority

Medium

Privaty: Unkind Maid

PVE investment

1/1/4 → 4/4/4 → 7/7/4 (→ 10/10/7)

PVP investment

1/1/4 → 4/4/4 → 4/4/7 (→ 4/4/10)

Priority

High (Late Game)

Product 08

PVE investment

1/1/1

PVP investment

1/1/1

Priority

Product 12

PVE investment

1/1/1

PVP investment

1/1/1

Priority

Product 23

PVE investment

1/1/1

PVP investment

1/1/1

Priority

Quency

PVE investment

1/1/1 → 4/4/4

PVP investment

1/1/1

Priority

Very Low

Quency: Escape Queen

PVE investment

4/4/4 → 4/7/7 → 7/10/8 (→ 10/10/10)

PVP investment

4/4/4 → 7/7/7 → 10/10/10

Priority

High

Quiry

PVE investment

1/1/1

PVP investment

1/1/1 (→ 4/4/7)

Priority

PVP

Ram

PVE investment

1/1/1

PVP investment

1/1/1

Priority

Rapi

PVE investment

1/1/1 → 3/3/3

PVP investment

1/1/1

Priority

Very Low

Rapi: Red Hood

PVE investment

1/1/1 → 4/4/4 → 7/7/7 (→ 10/10/10)

PVP investment

1/1/1 → 4/4/4 → 7/7/7 (→ 10/10/10)

Priority

Meta

Rapunzel

PVE investment

1/1/1 → 4/4/4

PVP investment

1/1/1 → 4/4/4 (→ 7/4/4)

Priority

Low (PVP)

Rapunzel: Pure Grace

PVE investment

1/1/1 → 4/4/4

PVP investment

1/1/1

Priority

Low

Raven

PVE investment

4/4/4 → 7/4/4 → 10/5/7 (→ 10/10/10)

PVP investment

4/4/4 (→ 10/4/10)

Priority

Meta (Late Game)

Red Hood

PVE investment

4/4/4 → 4/7/7 → 10/10/10

PVP investment

4/4/4 → 4/7/7 → 10/10/10

Priority

Meta

Rei

PVE investment

1/1/1

PVP investment

1/1/1

Priority

Rei Ayanami

PVE investment

4/4/7 → 7/7/7 → 7/10/10 (→ 10/10/10)

PVP investment

4/4/7 → 4/7/10

Priority

High

Rei Ayanami (Tentative Name)

PVE investment

1/1/1 → 7/4/4 → 10/7/7 (→ 10/10/10)

PVP investment

1/1/1 → 4/4/7 → 7/4/10 (→ 10/7/10)

Priority

Medium

Rem

PVE investment

4/4/4 → 7/4/4 → 10/4/7 (→ 10/7/10)

PVP investment

4/4/4

Priority

Medium

Rosanna

PVE investment

1/1/1

PVP investment

1/1/1 → 4/1/1 → 4/7/7 (→ 7/10/10)

Priority

PVP

Rosanna: Chic Ocean

PVE investment

1/1/1 → 4/4/4 → 4/7/10 (→ 7/10/10)

PVP investment

1/1/1 → 1/1/7 → 1/4/10 (→ 1/7/10)

Priority

Medium

Rouge

PVE investment

1/1/1 → 7/4/4 → 10/7/7 (→ 10/10/10)

PVP investment

1/1/1 → 4/4/4

Priority

Meta

Rumani

PVE investment

1/1/1 → 4/4/4

PVP investment

1/1/1 → 4/4/4

Priority

PVP

Rupee

PVE investment

1/1/1 → 4/4/4

PVP investment

1/1/1

Priority

Very Low

Rupee: Winter Shopper

PVE investment

1/1/1

PVP investment

1/1/1

Priority

Sakura

PVE investment

1/1/1 → 4/4/4 (→ 4/4/7)

PVP investment

1/1/1 → 4/4/4 (→ 4/4/7)

Priority

Low

Sakura Suzuhara

PVE investment

1/1/1 → 4/1/1

PVP investment

1/1/1

Priority

Sakura: Bloom in Summer

PVE investment

1/1/1 → 4/4/4 → 5/7/7 (→ 7/10/10)

PVP investment

1/1/1 → 1/4/4 → 1/7/7 (→ 1/10/10)

Priority

Medium

Scarlet

PVE investment

4/4/4 → 7/4/4 → 10/4/7 (→ 10/4/10)

PVP investment

4/4/4 → 7/4/7 → 10/7/10 (→ 10/10/10)

Priority

Meta

Scarlet: Black Shadow

PVE investment

4/4/4 → 7/4/7 → 10/7/10

PVP investment

4/4/4 → 7/4/7 → 10/7/10

Priority

Meta

Signal

PVE investment

1/1/1

PVP investment

1/1/1

Priority

Sin

PVE investment

1/1/1 (→ 4/4/4)

PVP investment

1/1/1

Priority

Very Low

Snow White

PVE investment

1/1/1 → 4/4/10 (→ 4/7/10)

PVP investment

1/1/1

Priority

High (Late Game)

Snow White: Innocent Days

PVE investment

1/1/1 → 4/4/4

PVP investment

1/1/1

Priority

Low

Soda

PVE investment

1/1/1 → 4/4/4

PVP investment

1/1/1

Priority

Very Low

Soda: Twinkling Bunny

PVE investment

4/4/4 → 4/7/7 → 4/10/7 (→ 7/10/10)

PVP investment

4/4/4 → 7/4/7 → 7/4/10 (→ 7/10/10)

Priority

High (Late Game)

Soldier EG

PVE investment

1/1/1

PVP investment

1/1/1

Priority

Soldier FA

PVE investment

1/1/1

PVP investment

1/1/1

Priority

Soldier OW

PVE investment

1/1/1

PVP investment

1/1/1

Priority

Soline

PVE investment

1/1/1

PVP investment

1/1/1

Priority

Sora

PVE investment

1/1/1 → 4/4/4 → 4/7/4 (→ 4/10/4)

PVP investment

1/1/1 → 4/4/4 → 4/1/7 (→ 7/1/10)

Priority

Very Low

Sugar

PVE investment

1/1/1 → 1/5/5

PVP investment

1/1/1 → 4/5/5

Priority

Very Low

Tia

PVE investment

4/1/1 → 7/4/4 → 10/4/4

PVP investment

4/1/1 → 7/4/4 → 10/4/4

Priority

Meta

Tove

PVE investment

1/1/1 → 9/4/4 → 9/7/7 (→ 9/10/10)

PVP investment

1/1/1

Priority

High (Late Game)

Tove (Treasure)

PVE investment

1/1/1 → 3/4/4 → 6/7/7 (→ 9/10/10)

PVP investment

1/1/1 → 3/4/4 → 6/7/7 (→ 9/10/10)

Priority

High

Trina

PVE investment

1/1/1 → 4/4/4 → 4/7/7 (→ 4/10/10)

PVP investment

1/1/1 → 4/4/4 → 4/7/7 (→ 4/10/10)

Priority

Medium

Trony

PVE investment

1/1/1 → 4/4/4 → 4/4/7 (→ 4/4/10)

PVP investment

1/1/1

Priority

Very Low

Vesti

PVE investment

1/1/1 → 4/4/4

PVP investment

1/1/1

Priority

Very Low

Vesti: Tactical Upgrade

PVE investment

1/1/1 → 4/7/7 → 7/10/10

PVP investment

1/1/1 → 4/7/7 → 7/10/10

Priority

Meta

Viper

PVE investment

1/1/1

PVP investment

1/1/1 (→ 4/4/4)

Priority

PVP

Viper (Treasure)

PVE investment

1/1/1 → 4/4/4 → 7/4/7 (→ 10/4/10)

PVP investment

1/1/1 → 4/4/4 → 7/4/7 (→ 10/4/10)

Priority

Low

Volume

PVE investment

1/1/1 → 1/1/4 → 1/4/4 (→ 1/7/7)

PVP investment

1/1/1

Priority

Low

Yan

PVE investment

1/1/1

PVP investment

1/1/1

Priority

Yulha

PVE investment

1/1/1 → 1/4/1 → 1/7/1 (→ 1/10/1)

PVP investment

1/1/1

Priority

High (Late Game)

Yuni

PVE investment

1/1/1

PVP investment

1/1/1

Priority

Zwei

PVE investment

1/1/1 → 4/1/4 → 7/4/7 (→ 10/7/10)

PVP investment

1/1/1

Priority

Low

iDoll Flower

PVE investment

1/1/1

PVP investment

1/1/1

Priority

iDoll Ocean

PVE investment

1/1/1

PVP investment

1/1/1

Priority

iDoll Sun

PVE investment

1/1/1

PVP investment

1/1/1

Priority

Skill Investment

How much you should invest into Skills on every character available in NIKKE.

Skill Investment

Glossary

Priority