Blanc

Wind

Assault Rifle

Defender

Burst 2

Tetra

Lucky Guard

■ Activates after landing 120 normal attack(s).
Creates a Shield, equivalent to 11.8% of the caster’s final Max HP, which protects all allies from damage. Lasts for 5 sec.

Rabbit Twins W

■ Activates after Full Burst ends. Affects all allies.
Constantly recovers 3.68% of caster's final Max HP every 1 sec for 5 sec
■ Activates when Full Burst ends with an ally from the same squad on the battlefield. Affects self.
Cooldown of Burst Skill ▼ 40.76 sec.

Showtime

60 sec Cooldown

■ Affects all allies.
Constantly recovers 3.84% of caster's final Max HP every 1 sec for 8 sec.
■ Affects 1 ally unit(s) with the lowest HP (except caster).
Gain indomitability for 10 sec.
Max HP ▲ 31.68% for 10 sec.
■ Affects all enemies.
Damage Taken ▲ 39.26% for 10 sec.

Support Range Increase

■ Activates only when in combat areas. Affects support squad Nikkes in this unit's squad.
Skill effect range ▲ 1 tile(s) continuously.

Skill recommendations

Skill 1

Skill 2

Burst

Build

Cube: Resilience or Bastion are the best option, like most units in the game. Quantum could be used if your team is low on burst generation.

OL Gear: Support unit so it doesn’t matter what you get. ATK, max ammunition and elemental damage are desirable but not required.

Pros & Cons

Huge damage taken debuff to enemies. One of the best buffs for bossing since characters nowadays get a lot of ATK / Attack damage on their own, making damage taken more valuable
A lot of utility for the team: heals, shields, debuffs, and provides indomitability on burst

Useless character if you don't pair her with another 777 member, since she is 60 seconds by default on her burst