Oomori, Yakumo

大守八雲 / ジェイソン / ヤモリ

A white-haired brute with sharp lizard eyes, he serves as an executive of Aogiri Tree. Yamori is a ghoul who is as frightening as his appearance suggests. Typically dressed in a completely white suit and a black dress shirt, he resembles a standard gangster.
Yamori developed a sadistic personality that mirrors his interrogator as a way to escape the reality of his torture. Before this torture, Yamori was much slimmer and less bulky, suggesting that his current physique was built after he became "Jason". This parallels Kaneki's own physical changes following the torture inflicted by Yamori. He is also a manipulative and deceitful ghoul who resorts to violence to obtain what he wants. Because of his brutality, he has earned the reputation of being the 13th Ward's Jason.
Yamori is a powerful ghoul possessing great physical strength and speed. To some degree, this is a result of him cannibalizing other ghouls. In the 13th Ward, almost no one dares to defy him.
His nickname Jason references Jason Voorhees, a character from the Friday the 13th movies. At times, Yamori wears a hockey mask, which is Jason Voorhees' trademark, and the fact that he hails from the 13th Ward adds another reference to Friday the 13th.