Lord Xemor's exact origin is unknown as he is one of the ageless Cosmic Elders, which is the first intelligent beings to evolve after the Big Bang. Xemor is often considered the embodiment of evil, he is known for his extreme callousness, brutality and ferocity in battle. He also has a deep fondness for personal executions. Xemor occasionally spares the lives of his subordinates, such as General Griff, if they are able to prove their worth.