Liberalio

A Burst 3 DPS who deals strong damage in Wind boss fights.
She lands charge-based shots on cores and quickly clears fights with Full Burst AoE bonus hits.

Calm Depths1 (Skill 1) gives her an attack damage buff at the start of Full Burst Time, and at the same time gives a Charge Speed buff to 1 Burst stage 3 ally (the one with the lowest final ATK). Afterward, landing Full Charge attacks on the core extends her attack damage buff, and the target hit by the Full Charge attack takes final ATK additional damage 5 times.

Strange Currents2 (Skill 2): if the target hit by a Full Charge attack is the stage target, she enters Torrent: a sustained attack damage state; if she hits a non-target Rapture, she switches to Gentle Current: charge time fixed at 1 sec. At battle start she gains immunity to Increased Charge Speed and Charge Speed reduction effects, so Charge Speed debuffs shake her less.

Submerged WorldB (Burst) keeps an attack damage buff on her for 10 sec and deals final ATK additional damage to all enemies. This AoE bonus hit lands along with the attack damage buffs built up above.

Auto works by default.
In boss fights, it's more reliable to prepare a charged shot right before Full Burst starts and keep the Torrent state going with core hits.
Also, checking once that the Charge Speed buff goes to the Burst stage 3 ally you want reduces losses.

The Resilience Cube shortens reload tempo so her firing flow isn't broken, and the Adjutant Cube helps her Full Charge play by adjusting Charge Speed.

Set the Elemental Advantage damage and ATK lines first, and adjust the remaining lines with Charge Speed and Max Ammo. Charge Speed helps time Full Charges during Auto stretches, and Max Ammo serves as support to ease the reload burden.

Damage and utility come from both Skill 1 and Skill 2, so prioritize raising those two skills while she grows. At the final stage, completing her Burst's AoE bonus hit is the clean finish.

Good as a DPS in Solo Raid and boss fights. In Story, her Full Burst AoE bonus hits clear stages quickly; in PvP, Skill 2's use is limited and her Burst hits can be delayed, so she can be tricky to run.

She builds damage in boss fights by reliably chaining her attack damage buffs.
In Full Burst she adds AoE bonus hits to all enemies, clearing fights quickly.
She is immune to Increased Charge Speed and Charge Speed reduction effects, so Charge Speed debuffs affect her less.
Skill 1 can give a Charge Speed buff to a Burst stage 3 ally, creating squad synergy.

If her Full Charge shots hit an enemy other than the stage target, Skill 2's state switches between Torrent and Gentle Current and she can lose damage.
If she becomes the target of Skill 1's Charge Speed buff, the effect tends to be wasted, so it's safer to check the buff target relationships among Burst stage 3 allies in your squad.
In PvP, Skill 2 works only partially and her Burst hits can land late.