Mr. Christopherson has dark brown hair and a tall, lanky build. He wears a salmon colored button-up shirt and yellow tie.
Mr. Christopherson is rather reserved and soft spoken, and seems to have some anxiety when engaging with other people. He is very well meaning and lenient with the school's students. He also seems invested in making school enjoyable for them despite the school's rules, as shown in School Forever when he got Reggie a whiteboard for her locker so she could continue drawing without defacing school property.