Always wearing a helmet, Raimu never talks. She acts as the big sister figure of the group, but little is known of her. She rides a Kawasaki ZX-12R.

Raimu is actually in her thirties and has re-enrolled using a false 18-year-old student ID at the school principal's request to keep an eye on the members when they decided to reform the motorcycle club. It was originally disbanded twenty years ago after a serious accident involving her during a race.

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