Sajuna Inui (乾いぬい 紗さ寿じゅ叶な, Inui Sajuna?) 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 outfit. She is a famous online cosplayer who goes by the name of "Juju." Sajuna is rather headstrong and blunt, despite her child-like appearance. She has no problem with chiding others or speaking harshly when it comes to it, and can be quick to lose her temper as well.