She's a first-year student belonging to the "flower" class at Hyakkaou Private Academy and a member of the Student Council. Her father is the president of a prominent toy company in Japan. Her hobby is collecting other people’s nails.

Spoiler

Since Kaede betted his lifeplan Yumeko received it, but gave it to Itsuki. Its apparent, that she actually has feelings for him. She watches over him, as he lays in bed, still under shock. She goes on to collect quite a few votes during the election. And she is also present during Yumemis battle against Kawaru