Milk: Blooming Bunny

A Burst 1 pierce DPS using Iron, whose strength is that ATK, Pierce Damage, and distributed damage all grow during Embarrassed and Embarrassment ExplosionB.
She offers lots of room for top-tier firepower builds in Iron boss fights, but Embarrassed only triggers if you hold a Full Charge a bit longer, and must be re-triggered right after Burst, so auto alone costs a lot.
The gap between manually timing her cycle and not doing so is large.

Embarrassment Suppression1 grants Pierce for 6 seconds on Full Charge attacks, and holding Full Charge for 0.5 seconds or more applies Embarrassed if she is not already Embarrassed. At that point, distributed damage to all enemies, removal of 100% of her ammo, a fixed 50% Reload Speed reduction 1 time, Forced Reload, and Increased ATK all apply together.

Outburst2 keeps raising her own Pierce Damage while Embarrassed, and while she is in the What Are You Looking At?!! state, deals distributed damage to all enemies every 2 seconds.

Embarrassment ExplosionB puts her in the What Are You Looking At?!! state, granting Embarrassed immunity, increased Pierce Damage, and Increased ATK for 10 seconds. Her Burst Cooldown is 40 seconds.

On auto alone, she tends to fire right after a Full Charge, so she often misses the Embarrassed condition.
To hit her cap, you must re-trigger Embarrassed at the start of battle and right after Full Burst ends following her own Burst.
You need to fire Full Charge shots at set intervals to keep Pierce up, so manual control matters a lot.

An example of a high-ceiling combo for Iron boss fights.

Covering Reload Speed and Max Ammo first lets her extend her firepower window after Embarrassed. If ammo runs short, use an ammo refill Harmony Cube. If you have a higher-level cube, look at level before order.

Set Elemental Advantage damage and ATK as the baseline, then add Max Ammo and Charge Damage to keep firepower steady during manual windows.

Her Burst window makes up a large share of her firepower, so raise the Burst first. Embarrassment Suppression1 and Outburst2 work best raised together.

She can be used as a DPS in Raids and boss fights. In story and Tower too, she can aim for high firepower if you can control her manually. Her priority drops in Arena.

Her self-buff values are high, so her firepower during pierce and distributed damage windows is strong.

You have to keep tracking when Embarrassed triggers and refreshes, so control fatigue is high.
On auto alone, it is hard to reach her peak firepower.
Her Burst Cooldown is 40 seconds, so she affects the whole squad's rotation.