Inui, Shinju

乾心寿

Shinju is depicted as a girl who is relatively tall for her age. Similar to her sister, she has pale pink hair that reaches the upper part of her back. However, unlike her sister's sharp hazel eyes, Shinju's eyes are light brown and have a droopy shape.
Due to her tall height and large bust, her appearance leads people to assume she is an adult, although she is actually only a middle school student.
In contrast to her sister, who is blunt and headstrong, Shinju is a timid but kind-hearted girl. She tends to get nervous easily, particularly when meeting new people, as demonstrated during her initial encounter with Gojo and Marin. Aside from this, Shinju deeply admires and loves her sister, working as her cosplay photographer and maintaining an online account to share her sister's work. Shinju enjoys the series Flower Princess Blaze, along with Sajuna and Marin. Her favorite character from the show is the older brother Soma, because his caring nature reminds Shinju of her sister.
Shinju is conscious of her mature figure, especially her chest, and is shown to feel embarrassed about it. She also refers to herself as "fat" in the Japanese dub of the anime.
Like her friends and "big" sister, she is interested in trying cosplay, but unlike the others, she wants to cosplay as a boy. Her large chest, however, has proven to be an obstacle in achieving this goal.