Marshall Lee (Marshall Lee the Vampire King), is the heir to the Nightosphere (basically the hell of the AT universe) and the main character of Marshall Time.
Marshall Lee has a slim body, an average height, black hair, and light gray skin. He has a matching permanent bite mark on his neck showing he is a vampire. He usual seen wearing a red plaid shirt with gray stripes, dark blue jeans, and brownish-red and white sneakers. His physical appearance is that of a typical late teenager or a young adult, but he appears to be a little shorter than her. He appears about the age of 18.
He has the ability to float, he also sucks the red out of well anything colored red or with the color red in it so he can also drink pink he uses this is food instead of blood, he also sings and plays bass, he can turn into a bat, raise the dead, and rapidly heal.
Marshall Lee describes himself as a villain. He is rowdy, endangering others with his violent, 'friendly' rough-housing. He appears to have an interest in music, as he's shown to rap and carry around and play an electric axe guitar. He also likes to mess with people through elaborate jokes. He seems to feel remorse when he goes too far. He is also occasionally perverted when around Fionna and seems to dislike Bubba (Prince Gumball) to an extent.