Yakov Borisovich Petrov

Yakov Borisovich Petorofu (ヤーコフ・ボリソヴィッチ・ペトロフ) is Niko's father, and an employee of GIGO Company.

Digimon World Re:Digitize (manga)
He led the "Project Vitium", which started a global catastrophe years before Taiga and his friends were sent to the. At some point, he mysteriously disappeared.