Not much is known about Six’s father. We learn about him through Six’s flashbacks and during a vulnerable conversation he has with Dani Miranda at the veterinary clinic following their brutal encounter with the Lone Wolf. Six opens up to Dani, sharing with her that his father was monstrously abusive to him and his brother. In the name of toughening them up, his father would viciously abuse them with all manner of tactics, from simulated drowning to burning them with car cigarette lighters. Tragically, Six’s younger brother bore the brunt of it. In an act of brotherly heroism, Six one day killed his father with a shotgun, and for that, Six was sentenced to life in prison.