Noir

A strong Burst 3 buffer for Shotgun and Full Burst lineups. Lucky Charm1 raises ally ATK, and every Full Burst she supports Max Ammo and ammo refill.
In the same squad as Blanc, HP conditions and squad buffs line up for big synergy. Used alone without Blanc, her value drops.

A Burst 3 support who raises ally ATK with Lucky Charm1 while her HP is 70% or above, and grants Max Ammo and ammo refill with Rabbit Twins B2 on entering Full Burst.

FinaleB damages all enemies and grants Shotgun allies Hit Rate and Damage to Interruption Parts. If same-squad allies remain when Full Burst ends, the Hit Rate and Interruption Parts buffs last longer.

Lucky Charm1's buff amount scales with Noir's own ATK. Overload ATK lines only add to Noir's base stats and are not directly added to the team buff value.

Place her at the far right of the lineup (position 5) so Max Ammo and refill apply first during Full Burst.
When used with Blanc, keep HP at 70% or above so Lucky Charm1 does not drop.
Auto is fine by default, but when waves are spread out, aim manually at mid range.

Also used in squads with Max Ammo and Shotgun DPS such as Sugar and Modernia. Putting her in a solo slot instead of Drake is only for when you lack Blanc.

For Shotgun reloads, prioritize Resilience Cube. Support sustained fire with Bastion Cube and Hit Rate with Assault Cube. If Harmony Cube levels differ greatly, use the higher-level cube over the ranking.

For her own damage and accuracy, prioritize Elemental Advantage damage, ATK, and Hit Rate. Max Ammo can feel weaker when overlapping with Rabbit Twins B2, so add only about 1 line.

Lucky Charm1 is a team buff scaling with caster ATK, so raise S1 first. Rabbit Twins B2's Max Ammo breakpoints are at levels 5 and 9, so in value terms aim for S2 at 5, and 9 when maxing. FinaleB is low priority except against bosses with tough Interruption Parts.

Used with Blanc in Story and boss waves, and in Interception, Tower, and Union Raid with tough Interruption Parts. In the Arena, she is often placed in full Shotgun lineups (Pepper, Poli, Drake, Sugar, etc.).

Lucky Charm1 raises ally ATK almost without interruption.
Every Full Burst, Max Ammo and ammo refill extend Shotgun and Machine Gun damage uptime.
FinaleB raises hit rate and damage against Interruption Parts, helping with QTEs and tough cores.

Without Blanc, it is hard to meet her squad link and HP conditions.
In Story waves, Shotgun shots tend to miss when the distance grows.
Skills that raise Max Ammo are hard to combine with units that rely on last-bullet conditions.