Yua Kokushikan

"Transfer boy, I love you. Be my boyfriend."

A mysterious girl with unique sensibilities. In addition to her strange way of thinking, she is unable to converse properly with others. The things she says are hard to understand. She communicates through puppets (a boy and a girl).

From official Twitter

She and her "sisters," Mii and Kikka, are alternate personas and disguises for Honoka Kokushikan.