His father is the one and only Tom Riddle, also known as the dark lord, Voldemort. Mattheo is very loyal to his father and his fathers beliefs. He’s a Death Eater, as he has the mark on his left forearm. Growing up, Mattheo was always pressured into learning the dark arts. He was physically abused, and mentally, but his evil father. Over time, Mattheo took after his father. Often acting out in violent ways, or being manipulative.