High Quality Content by WIKIPEDIA articles! Xemu is a fictional character in the Marvel Universe. XEmu is a would-be conqueror who has sometime ruled a world in the so-called "Fifth Dimension". WHen a house-building firm tried to establish a lot in the region of a portal to Xemu's dimension, one of Xemu's agents caused the houses to sink into the ground. THe Human Torch investigated, but had his powers sapped by an energy ray and was taken to the Fifth Dimension and imprisoned. REbels led by the scientist Phineas freed the Torch, who helped them depose Xemu and allow Phineas to take his place. EVentually, Xemu escaped and overthrew Phineas, determined to once again try to take over the Earth.