AI buster follows the adventures of Albireo, as he plays a beta version of what will soon be known as "The World." In his journeys, Albireo encounters Lycoris, a failed version of Aura and makes a connection that may turn out to be inseparable.

Albireo
A debugger and the main character. He is also Watarai and the Captain.

Balmung
Balmung a legendary player that is known all over the World. The wings were part of a mod he obtained during .hack//AI BUSTER. He was one of two players that destroyed the One Sin, during the "One Sin avent".

Lycoris
She is deaf, blind, and mute.

Orca
Orca: Like Balmung, Orca is a lengendary player. In the video game series, he is Kite's classmate that convinces him to play, "The World".

Writer Tatsuya Hamazaki is the writer of several Gundam manga, as well as the author of several One Piece novelizations.