David Hogan was once married and had a son, but ironically his wife died shortly after giving birth. Once the king of hell but with his memories and powers sealed, his identity now is one of the seven supreme angels of heaven [Angel of Ashes] and also the homeroom teacher and a math teacher who works secretly under the orders of heaven to monitor Yggdrasil Academy. He looks like an 40 years old man grumpy uncle, people regularly see him chasing after naughty student and he kind with good student