Emerl-Z is the leader of Z-X5. He is fast and agile, and can easily analyze, mimic and improve any action he sees, and sometimes entire fighting styles. His vehicle is the X-Draco, a dragonesque mini-star-cruiser. He also seems to be particularly fond of Robin, as he always appears in a predicament and saves her against all odds. Nobody knows why he does this.
Unlike his former copy, a gold-colored robot called Emerl, Emerl-Z can copy supernatural abilities, such as shapeshifting, teleporting and psychic abilities. The silver disc in his hand can be used as many things, including a grappling hook, a blaster, a throwing weapon and a shield.