Brid: Silent TrackLimited

In Wind Code boss fights she is a strong Burst 2 support who greatly boosts team firepower.
Conversely, against non-Wind Code enemies her key debuff value disappears, and her priority as a core pick clearly drops.

At the start of Full Burst she applies increased damage taken to all Wind Code enemies, and stacking normal attacks adds increased damage taken on a single target.
Her Burst grants all allies except herself an ATK buff based on caster's ATK, raising squad damage.
In short, against Wind Code enemies she keeps a debuff and an ATK buff up at the same time to amplify team damage.

Auto is enough by default.
In boss fights, you only need to manually time her Burst to your firepower window.
Against non-Wind Code enemies her efficiency drops, so compare her with alternative Burst 2 units when building your team.

She is repeatedly seen in Shotgun-centered lineups, but the ideal fixed combo varies with your roster and investment, so manual input is recommended.

Max Ammo and Reload support to stabilize her normal-attack stacking triggers is the safe choice. If the cube level gap is large, use the higher-level Harmony Cube first.

The more Wind Code boss fights you run, the higher the priority of Elemental Advantage damage and ATK. Fill the remaining lines with Max Ammo and crit options.

Her Burst and her 2 passives all contribute to key windows, so balanced investment pays off in the end.

She contributes a lot in boss fights (especially against Wind Code enemies). In Story there are many general-purpose Burst 2 alternatives, so she is not often a priority pick; in Tower she is used selectively depending on stage conditions and your roster.

In Wind Code boss fights she provides a debuff and an ATK buff at the same time, greatly raising the team's total damage.

Outside fights against Wind Code enemies her strengths shrink, so she is hard to use as a general-purpose core pick.

Paired with a Shotgun lineup she can also contribute personal damage, but her core value lies in amplifying the team in Wind Code boss fights.