Rika Shiguma

Rika Shiguma is one of the main characters in the light novel and anime series Haganai. She is a first-year student at St. Chronica's Academy and a scientific genius. She was saved by Kodaka when she fell unconscious during a disastrous lab experiment (she invented and released sleeping gas that works in just a few seconds), and begs to repay his kindness with sex. She joined theNeighbor's Club just to get closer to him.

She is the fifth member of the club. Rika was a shut-in before joining, being isolated from the outside world her personal room in the school, she prefers the life of a loner like Yozora and like her, is extremely anti-social.

She is voiced by Misato Fukuen in the Japanese version of the anime and Alexis Tipton in the English version, the former of whom also voices Yin and Kurumu Kurono.