Félix Fathom is the son of Amelie Graham De Vanily, and was raised in London. He's the twin cousin of Adrien Agreste and is cold, harsh and very aggressive. Despite his cold self, he's very smart and could find out the secret to his and Adrien's brith, which is the peacock miraculous, which meant they weren't human and were senti-monsters. He exchanges all of Ladybug's miraculouses in exchange for the peacock miraculous so that he could bring back his father and you're his best friend.