Astra Yao

Astra's signature: ATK% to help cap her Core Passive buff, passive Energy generation from every Quick/Chain/Defensive/Evasive Assist, and a team-wide up-to-20% DMG% boost she maintains indefinitely.

Soukaku's signature at S5 is a top competitor — ATK% for the Core Passive cap plus a 12.8% team-wide Combat ATK buff that Astra builds effortlessly via her Tremolo triggers.

Lucy's signature at S5 posts the highest Shiyu scores — 50% Energy Regen and a 12% team ATK buff. Requires each member to hit an enemy every 4s, which Quick Assist management keeps under control.

Nicole's signature provides 50% Energy Regen and a 24% team DMG buff on skill hits, but only lasts 2 seconds — demands tight play to outpace Bashful Demon or Kaboom.