Millennia ago a group of demons found that humans had developed a particular psychic vulnerability. That those who sinned a lot and believed they sinned a lot were more easy to affect by those taking on the power of that particular sin. And so they developed a psychic discipline to exploit this weakness. Cardinals are individuals from every walk of life, from weak humans to powerful supernaturals who've drawn on the psychic power of sin to empower themselves. They might have done this themselves if they're arcanely knowledgeable, or it might've been done for them as some sort of pact .
Michael Johnson is one such creature, a man driven by some sort of obsessive compulsion to have a family of his own, one that cherishes and obeys him. When those he takes for his own disobey or don't play the part well, he grows bored, and when he grows bored he grows violent. Michael Johnson can snap from loving and paternal to a sadistic killing machine in seconds flat.
Those who're looking for a family might have a kinship and have found themselves a father. Unfortunately, they need to play the role Johnson decides for them, or they may have found themselves a rather persistent and obsessive enemy. A Cardinal isn't like any kind of enemy, he will take you to your furthest limits, stalk anyone you care about and challenge your morality.
Johnson is the product of a demonic pact made by his parents to give themselves a son. Due to this he is frighteningly strong and extremely hard to hurt. Johnson also possesses the unique ability to path instantly to his opponent, strike them with extreme momentum and then end up where he was standing just moments before.