Quency

An Electric Code Burst 1 support who applies ATK and HP buffs to the top 2 allies by ATK.
She's rarely a core pick and is only used for light supplementary healing in bosses and Story when you lack Pepper or Dolla.

Hidden Accomplice2 raises the ATK of the 2 allies with the highest final ATK, and The Great EscapeB raises the max HP and Critical Damage of the same targets. Every 60 shots, New Route1 copies part of the HP of the Nikke with the highest max HP to reinforce her own HP.

The HP gained from The Great EscapeB comes in as healing. New Route1 only heals on the first stack; if it stacks again within 10 sec, it only refreshes.

Time her buffs to Hidden Accomplice2's 8-sec cooldown.
Use The Great EscapeB when you only need light healing, such as against bosses.
Don't put her in Arena or core Raid lineups.

Quency: Escape Queen is a separate Nikke. Burst 1 healers and buffers like Pepper, Dolla, and Soda are the core picks, and there's no evidence of recent meta squads grouping them together.

For New Route1 and survival, use the Vigor Cube and Tempering Cube; for sustained fire, the Resilience Cube, in that order.

Skip DPS-oriented Elemental Advantage and ATK lines. For survival and sustained fire, consider DEF, max HP, Max Ammo, and similar.

New Route1's healing feels weak on Auto, so it's low priority. Raise Hidden Accomplice2 and The Great EscapeB.

She only buffs and heals the top 2 allies by ATK. She's rarely a core healer compared with Pepper or Dolla, and is used for light boss support or as a substitute Burst 1.

Hidden Accomplice2 keeps an ATK buff on the top 2 allies by ATK for a long time.
The Great EscapeB raises HP and Critical Damage.
New Route1 reinforces her own HP.

Her healing and buff targets are limited to the top 2 allies by ATK.
As a Submachine Gun, her Burst Gauge contribution is low.
She doesn't fit core Arena or Raid lineups.