Sakyuba-chan is a demon child enrolled in a hellish kindergarten, where young demons train for future human world takeovers. Her distinct demonic traits include pigtails and a snaggletooth. Her character design and concept originated from a crowdsourced project, with contributor submissions shaping her final appearance and narrative role.

As a central figure in the series, she interacts with other demon children and their teacher within the kindergarten setting. Her personality embodies the mischievous and chaotic tone of the shorts, typical among demon toddlers. She forms part of an ensemble alongside students like Kerubero-kun, Levia-chan, Sakura-chan, and Yuki-chan, engaging in comedic scenarios focused on their hellish education.