Sajuna Inui (乾 紗寿叶) is a supporting character in the series that first appears in Volume 2. After seeing Wakana's first cosplay outfit online, she tracks him down to hire him to create her next cosplay. She is a famous online cosplayer that goes by the name "Juju." Sajuna is a bit headstrong in her interactions with Marin and Wakana at first. She is very passionate about cosplaying as it helps accomplish her dream of being a "magical girl." She likes doting on her little sister and becomes blushed whenever Shinju compliments her in any way. Sajuna is a bit of tsundere.