Mr. Agar – Carl’s homeroom teacher. He detests Carl and always tries to look for a reason to get him into trouble. Whenever Carl doesn’t fail on a test or he successfully passes an assignment, Mr. Agar always accuses Carl of cheating. He also had Carl’s sister, Chloe, as a student (which might be a possible explanation as to why he dislikes Carl). He expressed (various times) his irritation and dislike of the Crashman bloodline and he is smart.