The Hidden Battle for London Town
The Boy Who Wouldn't Grow Up
A scion of the Tuatha, known for menacing Roman London for centuries. He was run off by James Moriarty, but has returned in the light of his death.
Despite appearing as a ginger-haired young boy, he is approximately 624 years old (according to Mycroft, at least, and he’s rarely wrong about mathematics). He has shown the ability to fly without aid and to control shadows.
Original text: Peter Pan in Kensington Gardens as part of The Little White Bird anthology, by J.M. Barrie.