Elementary Sensei is a minor character in TIN the Incompetent Ninja. He was the teacher of the Ninja Elementary.
He was the teacher of the Ninja Elementary. When TIN was sent back to elementary school and the sensei saw him he immediately killed himself because he didn't want to teach TIN. TIN hid his body and then decided to become the teacher himself.
Like some elder ninja's, the Elementary Sensei wears a robe with a red band. He wears glasses and is supported by a cane.