LaplaceHas Favorite Item

With her Favorite Item, an Iron Burst 3 Rocket Launcher whose piercing laser Burst hits cores and parts together for damage.
If she pre-stacks Hero Vision with Full Charge before Bursting, ignore-DEF damage applies for the Burst duration.
Rather than a general main DPS, she finds use in part-heavy boss fights and spots like Missilis Tower.

Landing Full Charge attacks stacks Hero Vision, enlarging explosion range; with her Favorite Item, the duration is longer, making it easy to keep stacks until Burst timing. At max Hero Vision stacks, Full Charge hits add extra damage, and hitting parts deals extra damage to the main body. Using her Burst Skill changes her weapon to a laser that deals pierce damage, and at max Hero Vision stacks, her Burst's normal damage applies as ignore-DEF damage. She cannot take cover while casting her Burst.

Right before Burst, stack Hero Vision to max with Full Charge.
Her Burst laser pierces, so aim to line up cores and parts, and handle only the 10-second no-cover window manually.
Otherwise auto is enough.

Prioritize Charge Speed and Charge Damage to fire Full Charge shots often. Support reloads with Resilience Cube. If Harmony Cube levels differ greatly, use the higher-level cube over the theoretical ranking.

Elemental Advantage damage and ATK are the baseline. Put the rest into Charge Speed and Charge Damage, and add Max Ammo only when handling feels awkward.

Her Burst carries the piercing laser and Favorite Item ignore-DEF damage, so raise Burst and S2 first. Hero Vision just extends stack duration for easier setup, so do it last.

In part-heavy boss fights, her piercing laser hits cores and parts together for value. In Story, the no-cover window during Burst is a burden so she is rarely a main pick, and in the Arena her weapon makes her low priority.

With her Favorite Item, her Burst lasts longer, and her piercing laser hits cores and parts together.
At max Hero Vision stacks, her Burst damage applies as ignore-DEF damage.
Full Charge enlarges her explosion range, helping clear distant mobs too.

She cannot take cover while casting her Burst, raising hit risk for 10 seconds.
If she fails to stack Hero Vision, her Burst value drops sharply, so keep landing Full Charge shots.

Based on the Favorite Item skill text.