Imp is a small devious being who in his dimension (7th to be exact) is a child even though he is over one thousand years old. Imp is insanely powerful with abilities going as far as bringing buildings to life to make them fight each other and briefly turned the world into a marshmallow paradise. Imp had been having a affair with fellow teammate Deadly Nightshade but she find this extremely dangerous because of the possibility that Imp might destroy reality in a pleasure-induced loss of control.
Imp can warp reality to whatever he pleases with the power by unfolding reality. He rewrote history to make it like superheroes had never existed.
Imp is based on Mr. Mxyzptlk, a reality manipulating imp from the 5th Dimension which is among Superman's villains.