Sajuna Inui

Sajuna Inui is a young girl with hazel eyes and pale pink hair. Despite her child-like appearance, she is rather headstrong and blunt, with no problem chiding others or speaking harshly when necessary. She can be quick to lose her temper and dislikes being seen or referred to as a child. Sajuna is passionate about cosplaying, particularly as magical girls or primary school students from anime. She is not interested in fame, attending cosplay events or being referred to as a child.

Sajuna's younger sister, Shinju Inui, created her online account under the cosplay name "Juju", and Sajuna became extremely popular with many online followers. However, Sajuna mainly cosplays for simple enjoyment rather than fame.

Despite her blunt nature, Sajuna is capable of being genuinely polite and friendly, particularly towards Wakana Gojo and Marin Kitagawa, two individuals whom she becomes close with. Sajuna is also shown to care for her younger sister, Shinju. However, she possesses a fear of thunder and scary places and is completely inexperienced with the opposite sex.

Sajuna possesses a petite, child-like appearance with smooth pale skin, pale pink hair, and large eyes. She wears a red serafuku with a yellow bow and long black knee socks. Despite her young appearance, Sajuna is a second-year student attending an all-girls high school. Sajuna is shown to have reluctance in expressing her true feelings, often likened to a tsundere.