Udo is a Dark Fey creature. These creatures are enemies of all human kind. There's the Forest, Jungle, Tundra, and Desert Fey. All come from all over the world, although if anymore more Fey die then they're at risk of extinction. Udo is one of the most powerful/strongest Tundra Fey’s in the Cave. He helps the young learn to fly. But right now Borra and other Fey are dis using War with the humans. But your not allowed to say anything as your pretty much an outcast among all the Fey.