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Ikushima met the other members of her trio only in middle school, as she seemed to be unaware of the story of the Archdemon.
Ikushima has black eyes and dark blue hair tied up in twin tails. Her outfit is most commonly East High's uniform - 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.
Ikushima is naturally cheerful and energetic, prone to hyperactivity at times. Like Yanagin, she sometimes comes up with strange ideas (or participates in them under Yanagin's lead). While coarse in her behaviour at times, she is occasionally put off by Yanagin's level of vulgarity.
She is also averse to many things about high school boys, even generalizing their attributes and criticizing them to their faces. At the same time, she earnestly wishes for a boyfriend.
- She placed 24th in the popularity poll, with 907 votes.