Kasumi Konjou

As the inaugural president of the Adventure Club, this influential figure played a pivotal role in the club's early history. After her graduation, she departed alongside the entirety of the Nanana Collection, leaving behind a significant legacy. Renowned for authoring the "Nanana Manual," she remains an indispensable figure in the series' lore and shares an exceptionally close, unique bond with Ryuugajou Nanana.