Chudelkin

The elder and close aide to the Administrator.

He is deeply devoted to the Administrator and shares her selfish and vile personality. He refers to the Integrity Knights under his command as "Number ○○" and treats them merely as tools. Utilizing his unique physique, with an extremely enlarged head compared to his body, he can perform sacred arts not only with his hands but also with his feet and even his eyes by standing on his head. Although his sacred arts skills are highly advanced, his repulsive appearance and arrogant attitude make him disliked by the Integrity Knights.

After Bercouli's defeat, he petrifies him and plans to take Eugeo to the Administrator while dealing with Kirito and Alice, but ends up being counterattacked. During the battle on the top floor, he is given a chance to redeem himself by the Administrator but is defeated by Kirito and the others, who exploit his obsession with her. He is then treated roughly as a disposable pawn by the Administrator. However, he is not completely dead and, in the end, turns himself into flames and clings to the fleeing Administrator, taking her down with him.