Also known as: ヒアンシー(休日のバルネア大冒険)
An Official Alternate Costume of Honkai: Star Rail's Hyacine (Honkai: Star Rail), first seen in a cutscene in the 3.1 story and formalized in the light cone "Holiday Thermae Escapade".
It consists of a White Dress with pink Gradient Sleeves, a gold Choker, aqua Neck Ribbon, aqua belt Sash paired with a Yellow Sash, Hair Scrunchies, and a white Hair Bow.