Marshall Lee the Vampire King is a character on Adventure Time. He was a minor character on Adventure Time with Fionna and Cake. He wasn't really shown that long nor did he have any lines.
Marshall Lee didn't have any lines but, many fans give him the same personality of Marceline. And judging from the rock-symbol he gave Fionna he is shown to like music.
Marshall has black hair similar to marceline's but shorter, light bluish-grayish skin, fangs and the same permanant bite marks. He wears a black and red plaid shirt jeans and light red converse sneakers.