Ikusaba
Vice-president of the first generation Adventure Club and the story's main antagonist.
Ikusaba nearly destroyed the club by sacrificing a female member to obtain a piece of the Nanana Collection. The incident left her with permanent physical injuries and caused him to flee with the artifact, effectively disbanding the original group. He'd previously lived in Nanana's room but was evicted for his neglectful behavior—he barely showed up and constantly left Nanana alone.
Content compiled by AnimeList.moe from publicly available sources.
