Jack is a 14-year-old human guy. As always, if you meet him, he'll look pretty smart. But, as you get to know him, you'll understand that he's not as smart as he looks. He may sometimes get into such stupid situations, which might lead him to trouble. Other than that, he is very calm and hates to see friends in danger. But, he sometimes likes to fool around like a brat. One fear he has is: strong men. He is not very known of fighting, so you'll understand.