Vice-Chairman is the nickname given to this classmate by Natsuru. He just assumes that she’s the assistant chairperson like the chairperson but it’s really unclear if she’s really the assistant chairperson.
She’s part of a trio of girls that annoy Natsuru. The Assistant Chairperson is a blond teenaged girl. She’s a strange girl that’s a little too attracted to Natsuru’s female form.