Scarlet: Black Shadow

A Wind Code Burst 3 Rocket Launcher main DPS and a candidate who heavily shapes scores in Solo Raid and long single-boss fights.
Her firepower spikes sharply in the short window after using her Burst Skill.
In mob-heavy fights, she loses value when her spread damage doesn't land properly on the target.

Normally, her Full Charge shots change stage every third, sixth, and ninth shot, escalating in order from extra damage on a single low-DEF enemy, to area spread damage, to screen-wide spread damage. In the short window after using her Burst Skill, the same stage rules are compressed to change every first, second, and third shot, with Increased ATK and Increased Charge Damage applied together during that window. Each time Full Burst Time starts, Increased Max Ammunition Capacity and an ammo refill come in, supplying the ammo to keep firing charge shots.

When Full Burst starts, immediately follow up with Full Charge shots.
Auto handles her reload and charge patterns, so auto is enough by default.
On mob-heavy stages, her spread damage may not reach the intended enemy, so just handle aiming manually.

Reduce Charge Speed time with the Adjutant Cube and reload time with the Resilience Cube. Support charge damage with the Onslaught Cube. If Harmony Cube levels differ greatly, use the higher-level cube before the ranking.

Get at least one Charge Speed line at a high value. Ammo lines help shorten reload intervals even if they overlap with her skills. Adjust Crit Damage lines based on your setup's spare room.

To bring her ammo refill value up to target, raise S2 first. The Full Charge stage damage share comes from S1, and Burst completes the Burst-window ATK and Increased Charge Damage.

She can't be fielded alongside Alice or Noir, who also use the Burst stage 3 slot, so pick among them for that slot. If you want Charge Speed support, align her with your Burst stage 1 and 2 setup. She's used as a main DPS candidate in Solo Raid and Raid-style boss fights.

During Full Burst, Increased ATK, Increased Charge Damage, and compressed Full Charge stages hit all at once, causing a big spike in burst firepower.
At Full Burst start, Increased Max Ammunition Capacity and an ammo refill come in, boosting her charge-shot tempo.

In fights with many mixed enemies, her spread damage can scatter across mobs or parts, so her single-target firepower may fall short of expectations.
She can't be in the same lineup as other candidates who use the Burst stage 3 main DPS slot.