In the past, according to Astral, Dr. Faker used to be a kind person as he built Heartland for children. In the present, he seemed to be a cruel and malicious man, but during his Duel with Yuma, Shark and Kite, Faker revealed that it was all a facade and that everything he did, he did for the sake of his sons. Playing the part well, he was shown to be obsessed with destroying the Astral World and Astral himself. He seemingly saw Hart Tenjo as nothing more than a weapon, but he lets his facade slip when he showed great concern when Hart's powers were taken by the Vetrix Family. He also did not seem to care about friendship as he was willing to sacrifice Kazuma Tsukumo and Vetrix in order to achieve his ambition, though he was later shown to deeply regret this. It was also originally believed that he did not care about his sons Kite and Hart, only considering them as trivial sacrifices for his goal, to destroy the Astral World so that the Barian World can give him the power to rule the Earth.

Part of Faker's persona emphasized his arrogance and confidence in his own genius, a trait that is more pronounced in the dub.