Adrian Swallow (エイドリアン・スワロー Eidorian Suwarō) was Mycroft's father. He died in a carriage accident and his body was taken over by Eligos.


Adrian was a middle aged man with, seemingly, an perpetually stern expression on his face. He had short dark hair and somewhat thick eyebrows. He wears the attire of the nobles of Victorian England.


His personality is unknown. He seems to have been ruthless enough to make a deal with a demon in exchange for the soul of his son, Mycroft.


Adrian was a politician. He had a carriage accident in which he died, but made a contract with Eligos in exchange for the soul of his son.