Kelly thinks Stu is a bit annoying, but as shown in Cat Food, she will sometimes help her brother when he needs it.
Stu isn't hostile nor friendly to his mom. Even when his mom rejects his claims of seeing a Koekoeken, Stu doesn't get mad at his mom.
However, Stu is not above taking advantage of her to enjoy himself at home or take a day off from school.
- Stu is one of two Creeped Out main characters who have a sibling seen on-screen.
- Stu is the first male Creeped Out protagonist.
- Stu is the first of many Creeped Out characters to have no dad.