Eileen A. Jacobson is Jason's friend, though he denies this. She is extremely smart, with auburn-red hair and freckles. She is said to be ten, like Jason. Like other minor characters, her parents are barely shown, and it`s hinted that she also might have some slight feelings toward Jason, pranking him at summer camp, which is what usually young girls do when they like a boy, and hugging and making up with him at the end of summer camp. She went to the same science summer camp that Jason and Marcus went to. Eileen enjoys making Jason uncomfortable- she often hints that they have an obvious relationship. There was a series where she accidentally got a Valentine's day card from Jason, originally intended for Andy. Predictably, of course, chaos ensued.