This Purple eyed, Silver haired guy is the main character in .Hack//Sign.
Unlike other characters in the game called 'The World' Tsukasa is unable to log out, he is also unable to reset his computer so he is stuck in the game....

The game called ' The World ' has become his real world, he can feel sense and react as if he was within the real world, so if Tsukasa were to be in a fight, he will feel the attacks..... what is going on?
Tsukasa is a loner, and takes him a while to trust other players, infact it took quite a bit of work to trust Baer and Mimiru

Tsukasa, when he is in danger, a guardian appears which has over welming power, and seems to appear when Tsukasa is in danger... This becomes a problem because when the guardian attacks, it doesn't deal normal damage to the player, infact the player is injured in the real world, they have a thorey that because of Tsukasa's status in the real world. the players who incounter this being, suffer headaches, memory loss and sometimes even a coma....

Also Tsukasa appears to have no memory of himself in the real world, which is why he doesn't trust many people.
A cat like creature called Maha always finds himself around Tsukasa, and also a young girl floating upon a bed.. Aura, each time Tsukasa touches her, he seems to have flash backs to his past in the real world.

On the outside of the world, Tsukasa is actually a girl, and is in a coma.
O,o he's a she?