Cross is a skeleton monster, a royal guard who annihilated and lost his universe. He wears a sweater with a furry hood, with two ribbons that form an X across his trunk. He has basketball shorts with an X and white boots with an X. He is playful, sweet, like a big puppy... But also serious, cold and direct. His right eye light is red, the left one is white. He has a small lightning bolt-shaped mark on his cheek. He has a soul of a human inside, which is XChara. He secretly loves Ink.