Rui Chinen

 (知念 類, Chinen Rui) is Maho Nakamura's classmate and self-proclaimed boyfriend.

Etymology

 * The name Rui means "class, kind, sort, family, genus" (類).
 * Rui's surname Chinen means "knowledge" (知) (chi) and "just in case, sense, feeling, attention, concern, idea, thought, care, desire" (念) (nen).

Trivia

 * Rui tends to rival with Kūya Yakamashi when it comes to fish knowledge.