: A genius inventor and "mad scientist" who stays in the science lab all day. After Kodaka finds her unconscious following a lab explosion and takes her to the infirmary, she joins the club. Rika is openly perverted, often reading mecha magazines aloud in a way that sounds highly suggestive.
: A ten-year-old silver-haired nun who serves as the club’s faculty moderator. Despite her role as a teacher, she is naive and easily manipulated by Yozora, who tricks her into remaining the sponsor by appealing to her desire to be treated like an adult. Boku wa Tomodachi ga Sukunai Episode 4
: An effeminate student who has been stalking Kodaka. Yukimura views Kodaka as a "man among men" and wishes to become his underling to learn how to be more masculine. Misinterpreting the situation, Yozora convinces Yukimura to join the club—initially under the impression he is a boy, though his gender remains a point of ambiguity for the cast. : A genius inventor and "mad scientist" who
In the fourth episode of Boku wa Tomodachi ga Sukunai (Haganai), titled "Everything's Ambiguous, including the Pole," the Neighbors Club expands its membership with three distinct and eccentric new additions: , Yukimura Kusunoki , and Rika Shiguma . New Club Members : A ten-year-old silver-haired nun who serves as
The episode introduces the following characters, each bringing a unique brand of chaos to the club: