Ark Ranger Black

A Wind Assault Rifle Burst 3 damage-over-time DPS.
Breaking parts fills her battery to transform, sustaining ATK and damage over time for long periods, giving her a clear role in part-heavy PvE such as bosses.
Competition for the Wind AR Burst 3 slot is fierce, and since she just released, her main-slot priority is still being worked out.

From battle start her Damage to Parts increases, and her battery builds when allies break parts. When the battery is full she enters the transformed state with greatly increased ATK; over time the battery drains and the transformation ends.
While transformed, Ark Black Collider damage over time hits all enemies, and continuing normal attacks also grants a short damage over time buff.
During Full Burst, Wind Assault Rifle allies' damage over time rises. Her Burst Skill tops up the battery if she is transformed; otherwise she transforms immediately via Emergency Charge, then deals damage over time to the enemy with the highest HP and raises her own damage over time.

As an Assault Rifle, her basic fire can be left on auto.
In boss fights with parts, breaking parts with allies to fill her battery helps sustain her transformation.
Use her Burst Skill manually, depending on whether to transform immediately via Emergency Charge when not transformed, or top up the battery when already transformed.

Wind AR Burst 3s like Sakura: Bloom in Summer and Scarlet are same-slot alternatives, so squads running both as main DPS are rare.

Damage to Parts and battery charging are key, so prioritize Destruction Cube. Cut Assault Rifle reload with Resilience Cube and cover ammo with Wingman Cube. If Harmony Cube levels differ a lot, use the higher-level cube first.

Damage over time and transformed ATK are tied heavily to ATK and Elemental Advantage, so set Elemental Advantage and ATK first. As an Assault Rifle, use Max Ammo and Hit Rate to reduce firing gaps and misses.

Her transformation and Collider core are on S1 and S2, so raise both passives first. Burst holds the emergency transformation and damage over time core, so raise it as needed after 7.

Her transformation loop runs well against bosses and Raids where parts appear often. She does not fit modes like Arena where burst damage and target locking matter.

Part destruction fills her battery, sustaining transformed ATK and damage over time for long stretches.
During Full Burst she buffs damage over time for Wind Assault Rifle allies, fitting same-element AR teams.

She needs a warm-up to fill her battery before transforming, so her output comes late in fights with few parts.
She shares a slot with Wind AR Burst 3s like Sakura: Bloom in Summer and Scarlet, so pick only one when using a single main DPS slot.