Shikoku

Height: 161 cm (5'3")

Shikoku appears almost like a normal cute young girl of short stature, long purple hair that consists of snake tips, slitted eyes, sharp canines, and a black mark near the tip of her tongue. Most of the time, she is seen dressed in a traditional Japanese kimono with her hair tied in the back using a red ribbon.

Shikoku is a talkative person. Unlike Rairen, who was rather hostile towards humans to the point of mocking the entire species, even Tenka who nearly killed him, she finds humans interesting, using a smartphone and taking on different modern.

Despite her playful nature, Shikoku is tactical and careful, thinking and utilizing different plans to combat the Anti-Demon Corps, while maintaining her composure and advising Kuusetsu to be careful. But, she can also be surprised if a situation doesn't go as planned but still intrigued by the situation at hand.

Little is known about Shikoku's background. At some point prior to the 7th and 6th Unit's exhibition match, she attacked and defeated several members of the Anti-Demon Corps' 3rd Unit.

(Source: Mato Seihei no Slave Wiki)