Novel

An Iron Code Burst 2 debuffer; after stacking Evidence Collection with 100 normal shots, her Burst can apply Damage Taken increase.
She was used as single-boss and pierce DPS support, but is rare in the latest Raid and endgame main lineups.

Detective's Intuition2 builds Evidence Collection every 100 normal shots, raising her own DEF and lasting up to 5 stacks.

Something's Fishy Here1 damages the 3 enemies with the highest DEF and lowers their DEF. Case ClosedB damages the 1 enemy with the highest ATK, and at max Evidence Collection stacks applies Damage Taken increase to the same target for 5 seconds.

Reach 5 Evidence Collection stacks with 100 normal shots, then use Case ClosedB.
Keep ammo and sustained fire up so reloads do not drag out and stacks never drop.
Auto is fine by default, but position her so Damage Taken increase lands on the boss body.

Not a main combo in the latest Raids overall. Some older Snow White-centered boss squads used her without a healer, but there are many replacements now.

For keeping Evidence Collection up, go Resilience Cube and Bastion Cube, then Quantum Cube for Burst Gauge.

Skip DPS-oriented Elemental Advantage and ATK lines. To keep Evidence Collection going, prioritize 2~4 lines of Max Ammo.

Raise Case ClosedB first, then Something's Fishy Here1 and Detective's Intuition2 in that order. If she is not a meta main, raising only Burst is fine.

Used as single-boss, parts, and cumulative Brand damage support. Rarely used as a main Burst 2 in Solo Raid or endgame.

After max Evidence Collection stacks, her Burst applies Damage Taken increase.
Something's Fishy Here1 lowers the DEF of the 3 enemies with the highest DEF.
As a Submachine Gun, she builds stacks easily with normal shots.

She has no taunt or shield, so she cannot tank like Defender Nikkes.
Reaching 5 Evidence Collection stacks takes time, so her first Burst damage comes late.
She rarely makes it into the latest main PvE or PvP lineups.