Unlock requirements
To unlock one, the NIKKE needs an available Favorite Item, an SR doll at level 15, and Bond 30 (at least 2 Limit Breaks). Finish her Favorite Item quest to unlock Phase 1. It costs no character materials.
The doll keeps all of its stats and bonuses. Each phase upgrades one of the character's skills, but the order is not always the same. Phase 1 may upgrade Skill 2 or the Burst Skill instead of Skill 1.
Phase costs
The costs are fixed, with no Super Success.
| Target | Materials | Total materials | Days from zero | What it unlocks |
|---|
| Phase 1 | 0 | 0 | 0 | First skill upgrade |
| Phase 2 | 50 | 50 | 17 | Second skill upgrade |
| Phase 3 | 110 | 160 | 54 | Third skill upgrade |
Favorite Item dispatch gives 3 materials a day for one character. The day totals start from zero. Materials you already own shorten the wait.
How far to upgrade
Each character's upgrades are different. Check a current character guide before spending materials on the next phase.
You can exchange 5 unused materials for 1 material for another character. Exchange leftovers after reaching your chosen phase.