Aistriu Aes Sidhe
I am cosplaying as Ciel Phantomhive from the anime, "Black Butler". Ciel is a young boy from Victorian era England. His parents were murdered and his estate was destroyed. He made a deal with a demon to get revenge. The demon, Sebastian Michealis, agrees to comply to his every whim, becoming his butler, until Ciel get his revenge in exchange for Ciel's soul.
In the reference image, Ciel is on the left, and Sebastian is on the right.