John Paul "J.P." Mercer is one of Craig's best friends and one of the main characters from Cartoon Network series Craig of the Creek. He is optimistic, friendly, and not-too-bright. He lived with his mother, his sister, Laura, and his cat, Goo. He notices Maney, one of the Horse Girls, have a crush on him and feels the same way in the episode "JPony".
J.P. is tall compared to most characters in the series. He has light skin, a large head with proportionally smaller cheeks, black eyes and eyebrows, and red hair.
J.P. wears a long-sleeve orange and white striped V-neck, black shoes, and tan pants with a tear on his right knee.
J.P. is optimistic, friendly, adventurous, and insightful, for better or worse. He is very imaginative, sometimes to the point of seeming detached from reality, yet at other times he is hyper-aware, sometimes even breaking the fourth wall. Such statements usually go over other characters' heads, which can cause others to perceive him as unintelligent. He is relatively indifferent to the negative opinions some have of him, instead standing up for his friends.
As time goes on, he becomes more respected by kids and adults alike, sometimes even impressing Craig and Kelsey.
- In "Pencil Break Mania", he is an excellent pencil breaker.