In stark contrast to his sibling, he is the most anti-social of the two and seems to be in a constant foul mood, although not outright hostile. His rude behavior and refusal to even speak to Arisa forces Touya to often apologize on his behalf, but he is too preoccupied with his own burdens to bother being kind.
His Wonderland form is Shadow's twin, Light. He is just as brusque as his self in the real world, and unlike everyone's obvious adoration for Alice, he says to have no concern for her.
(Source: Ero + Dere)