Mica

A Wind Code Burst 1 Rocket Launcher Supporter who raises ammo and DEF for the 2 allies with the highest ATK and lowers DEF of all enemies with her Burst Skill.
She's rarely a main pick in Story, boss, or Raid lineups, and is only used as a stopgap Burst 1 when early resources are short.
If a better Nikke for the same role is available, her investment priority is low.

Every 20 hits taken, her own DEF rises, so she's used to tank hits on the front line. Using her skill grants the 2 allies with the highest final ATK both max ammo and DEF. Her Burst Skill damages all enemies and briefly reduces their DEF. She doesn't reduce Burst cooldown or heal.

Each time her skill comes off cooldown, she grants the top 2 allies by ATK an ammo buff.
To meet the hit count, keep her on the front line, and leave Rocket Launcher charged shots on auto by default.
Use her Burst in line with Full Burst order, and time your main DPS's sustained fire to the enemy DEF reduction window.

There's little evidence in the recent meta for pairing her in the same squad.

As a charge Rocket Launcher, cover reload and ammo recovery with the Bastion Cube and Resilience Cube. The Adjutant Cube supports Charge Speed. If Harmony Cube levels differ greatly, use the higher-level cube over the ranking.

Since she's support-focused, Overload investment itself is fairly low. Match Charge Speed to her Rocket Launcher firing tempo and ATK to her Burst damage.

Brave Star2 grants allies ammo and DEF, so raise S2 first. Wonderous Star1 is for her own survival, so bring it up next. Burst contributes little for the investment, so keep it low.

She's rarely used outside stopgap Burst 1 in early Story and bond-only lineups. Higher-tier Burst 1 Supporters like Mica: Snow Buddy replace her in the same slot.

Grants the 2 allies with the highest ATK both max ammo and DEF.
Her Burst Skill briefly lowers DEF of all enemies.
As hits stack up, her own DEF rises, so she can be placed on the front line.

She has no Burst cooldown reduction, healing, or debuff removal.
As an SR, her firepower and survival support are weaker than current meta Burst 1 Supporters.
As a charged Rocket Launcher, her Burst Gauge contribution isn't fast.
She almost never makes main lineups for Story, bosses, or Raids.

An SR Nikke from Tetra.