An unnamed military enterprise owner is the biological father of Yuri and Gilliam was responsible for creating the extra-legal wing of his business empire, more known as Black Phantom. Which is responsible for various crimes against humanity and later, the future war.
The leader of Black Phantom, an antagonistic figure, once only dealt in lawful weapons manufacturing businesses inherited from his family in his younger years. However, after the company heir married a woman with a hypnotic power that she could not control, he used his company's power and his and his wife's genetic material to artificially create two children for himself. And begin to milltarise ESP as a means of profits and begin inhumane experments and brainwashing Esper to his own end, neglecting his "children" in process.