The twin tails of the group and also a student of Sanada East Girls High. She usually goes along with Yanagin and her wild ideas.
Ikushima has dark blue hair tied up in two twintails. Her outfit varies, but her most common is a white long-sleeved shirt with a grey sweatshirt and a red-brown plaid skirt. She also wears navy blue knee-high socks with penny loafers.
She is usually a very hyper girl who (along with Yanagin) suggests strange ideas, which start up a big commotion. Ikushima specializes in wrestling (although during most scenes, she doesn't display her skills too well).