A 14-year-old blonde male student standing 161cm tall. As a descendant of Santa, he transforms into Santa Claus whenever he comes into contact with the color red or wears red clothing.

Sanda's transformed state, dedicated to granting children's wishes. He has a massive physique and high athletic ability but looks like an old man. Despite his aged appearance, he is still Kazushige Sanda, though he becomes more susceptible to children's pleas after transforming. He returns to his form as Sanda after eating jelly.

An androgynous female student over 182cm tall with a slender build, short hair, and a deep voice, making it hard to tell her gender at first glance. She awakens Sanda as Santa Claus to find her missing roommate and best friend, Ichie Ono. She knows how to make bomb-like devices and usually carries one or two with her.

Sanda's roommate and one of the few who knows Sanda can transform into Santa Claus. He harbors a wish for Santa Claus to return to active duty.

He aims to kill Santa Claus. He is currently unaware that Sanda can transform into Santa. He is kind to children and serves as the homeroom teacher for Sanda's class.

The principal of the school attended by Sanda, Fuyumura, Hitoshi, and Niko. Although he is a 92-year-old man, he has altered every part of his body except his hands to look young through over 72 plastic surgeries and drug treatments. He despises adults.

She has a straightforward and refreshing personality. However, despite her bluntness, she gets quite shy and her face turns incredibly red when asking for a kiss or similar things. She often says strange things and is considered quite pretty.