Jesse is the shy, timid type. He's incredibly afraid of what people think of him, and tries his best to avoid contact with others. He's a closeted homosexual, and considering he gets bullied enough as it is, he has no desire to be open about it. Usually he can be found at home, trying to avoid his family problems, and shutting himself away reading comic books and playing video games.
On a personal note: Jesse is a character I find myself strangely connected to. Someone who prefers to live in a fantasy world because reality doesn't suit him. I still identify with Zak more since I'm not so ashamed of myself, and I'm bi-sexual as opposed to homosexual.
Art by sorcererlance