A strange creature found by Polaris in space. He came to Earth with Polaris and Havok, and attacked Havok continuously. Eventually he was forced to hurt him, causing Daap to encapsulate both the Leper Queen and Polaris within himself and shoot off into space. Both Polaris and the Leper Queen where returned to Earth, but nothing was ever heard from Daap again.
Possibly Daap is the same entity as Doop, the X-force and X-statix camera man. Showing this much resemblance, it is almost certain they are at least of the same species.