Overview
Cartethyia is a 5★ Aero Sword Main DPS from Rinascita and a Version 3.6 featured carry. She still owns premium Aero cores that are not Qingxiao Tune Strain. If she is already built, keep her as a weekly clear and spend new Astrites elsewhere.
Rotation
Healer outros. Ciaccona, Aero Rover, or Iuno applies Aero utility and outros. Cartethyia intros, spends Forte Circuit and Resonance Skill, Resonance Liberation inside the window, then outro. Dodge-cancel the sword loop; dropped cancels dump the clear.
Strengths
Already-built accounts still clear. Flexible support cast. Featured because she still owns floors, not because she outscales every new name.
Weaknesses
Qingxiao competes for Waveplates and the same third slot. Signature is optional. Long enough field time to miss dodges.
Investment
Liberation, Forte, Skill. Finish the sonata you already started. Do not dismantle Gusts of Welkin until Qingxiao's Sierra Gale set is actually online.
Common Mistakes
Replacing a finished Cartethyia with an unbuilt Qingxiao on day one. Two Aero carries on one side. Building her as a pure support with zero CRIT.