First I thought that Gabriel was not a real person, that Raphael had changed his name after having done something stupid when he was young. Then I thought that Gabriel might have found a way to co-inhabit his brother's body after his death and possess him for short times which he doesn't remember, and he was the one who cursed Draco.

it was nice to write an OC who was kind of a jerk but still okay as a person

LOL 'cos Draco is not enough! :D