>>545595591
Probably this https://genshin-impact.fandom.com/wiki/Gold-Eyed_Celadon_Mare
Doubly so since in a past HoyoFair (not the most recent one but the one before that) Hoyo themselves had commissioned some random studio to animate this https://genshin-impact.fandom.com/wiki/Moonlit_Bamboo_Forest which presumably was to bring it into the mind of the players