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He is a BladeMaster, kinda looks like Orca. At the beginning of the anime he feels curious about Tsukasa, and starts to investigate about him, then BT, who apparently met him in the real world and is in love with him, tells him not to involve with Tsukasa´s life unless he is willing to take responsability, so when he finds out about the real Tsukasa and the way her father has treated her during her life and how he would rather let her die than to keep her comatose, he offers Tsukasa the choice of adopting her once she wakes up.
In the .Hack//LotT manga, Bear, Crim, Sora, and Piros make cameo appearances at Balmung's Tanabata event.
In real life, he is a novelist.