Rika Shiguma

Rika Shiguma is a supporting character from the Boku wa Tomodachi ga Sukunai Light Novel series. A freshman and scientific genius whose presence at St. Chronica's Academy was designed to increase its prestige. She was saved by Kodaka when she fell unconscious during a disastrous lab experiment (she invented and released sleeping gas that works in few seconds), and begs to repay his kindness with sex. She joined the Neighbor's Club just to get closer to him.

She is the fifth member of the club and the reason why Rika is unable to make friends is being isolated to her personal room in the school, being a natural loner like Yozora and also for being extremely perverted.