Like every other 5-star, Astra Yao and Ellen Joe's signature light cones can be obtained from their respective gacha banners in HSR 4.8. Since version 4.

Alongside Ellen Joe, Astra Yao will debut in HSR 4.8. She will follow the Harmony path in this turn-based gacha title, meaning she is going to be a full-fledged buffer for Ellen Joe.