Beranabus' father

Beranabus' father was a demon who raped his mother Brigitta. He did not participate in Beranabus's upbringing, making him only his biological father.

Demon Thief
Beranabus mentioned his parents to Kernel in the end of the book.

Demon Apocalypse
Following the Disciples' disruption of the possible demonata invasion, Beranabus reveals that he is half-demon (from his father's side). Beranabus doesn't reveal much about his demonic parent and only states that he had killed his father and used his skull as a chamber pot.

Death's Shadow
He was summoned by a powerful priestess. Brigitta's fiance angered the priestess so she summmoned Beranabus's father to attack Brigitta's guest and kidnap her. He raped Brigitta and gave birth to Beranabus.