Tooya Kamijou

Asagi's twin and older brother, he is warm and friendly towards Arisa, hoping to become even closer friends with her. Polite, responsible, and a lively conversationalist, he gets along quite well with others, although there appears to be friction between him and Asagi.

His Wonderland form is called Shadow, the equivalent of the Tweedledee and Tweedledum twins. He is much more chipper and immature than his counterpart in reality, but is always willing to help Arisa.

(Source: Ero + Dere)