Yumemi夢美 is a performer and idol from Canada. She is a yandere for salmon and loves NieR: Automata and Aimer.
Yumemi's lore hasn't been released yet but here is a blurb:
"In my world, human hearts are connected to the stars and as time went on, the stars have been burning out. My mission is to restore those hearts, to attain what was once a brilliant sky. Welcome to my world of beautiful dreams."