Thinker

Sinker (シンカー) is one of the 10,000 players of the cursed death game «Sword Art Online». He is in charge of the popular net gaming information site «MMO Today». He also formed «Sword Art Online»'s largest guild «The Army». He is trapped in the dungeon under the Black Iron Castle by a faction leader Kibaou. He is later rescued by Kirito and Asuna in volume 2 after he was thrown into a hidden dungeon. He appears again for the SAO clearing party along with Yuriel.