Denji's Father

This unnamed man was the father of Denji. He allegedly committed suicide when Denji was young, however, it is later revealed that Denji killed him in self-defense. After his death, Denji inherits his debt to the Yakuza.

Appearance
Of the little that is seen of him, Denji's father seemed to have the same hair just as his son.

Personality
Little is known of his personality, as he was deceased prior to the chronological beginning of the plot. Makima describes him as an abusive alcoholic, who was violent enough with Denji to the point where he was killed by his own son in self-defense. It is also implied that he had an addictive personality, losing large amounts of money to the Yakuza resulting in a massive debt which Denji later inherited.

Control Devil arc
Makima, revealing her intentions to Denji, reveals that his father died not from suicide, but rather from being killed at Denji's hands in an act of self-defense. His supposed suicide was, in reality, a ruse created by the Yakuza in order to have Denji inherit his debts.

Denji had been repressing this fact behind a psychological barrier, and when the memory comes to light Denji sees himself as a child, standing over his father's wounded and bleeding corpse.