head is selestia i believe.
I don't know where the body came from.
body breast size in the picture can also be made with tool BlendShapeLimitBreakTool
So it’s applicable to many avatar's body.
【改変幅拡大!】VRCブレンドシェイプ限界突破・合成ツール
https://goho-cheat-vrc.booth.pm/items/3703888
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