His personality changed from being clearly his own man to being the dummy of Peanut. Little Jeff is operated by using the footlever mechanism of a Hi-hat cymbal from a drumkit.
Little Jeff wears a black shirt with a white undershirt, black jeans, and a necklace and he is Peanut's ventriloquist dummy as Peanut and Jose referred to him as ugly and his nicknames, "Little Ugly Jeff" or "Little Ugly Assjeff". Little Jeff has a deep voice. In his persona as the "Loser", Little Jeff wears a green bodysuit that is covered with the letter "L" and a green mask in the shape of a large "L".