This page is about the Changeling, you may be looking for the human.
As Jim's high school history teacher, Mr. Strickler is a caring mentor and constant source of guidance. But unbeknownst to Jim, Strickler is a Changeling (one of Gunmar's Troll spies who can take human form). Charming, manipulative, and literally two-faced, Strickler befriends Jim's mom and becomes the threat closest to home for Jim and his loved ones.
As a human, Strickler is a tall and handsome man with black hair and a large nose. He wears a blue shirt under a light brown jacket, with darker brown pants and dark brown shoes.
In his true form, he is a tall and slender Troll with green skin, yellow eyes and large gray horns. He wears short brown pants, a large brown cape and a lot of metallic blades around his neck.
Stricklander uses metal throwing knives that are from the top of his cape.