Mister Stewart

Mister Stuart is a minor character in the anime series Sonic X and its comic series published by Archie Comics. He is a human government agent working undercover as a school teacher assigned to watch Sonic the Hedgehog and his friends by the President under the code name "Teacher" (Japanese version)/ "Chalkboard Charlie" (English version). As an agent, he owns numerous gadgets, including a green-blue spy car, which can transform into vehicle for water travel.

Appearance
Steward is a fairly regular human with neck-long blond hair and wears a blue coat, glasses, a turquoise vest, a white sweater, and dark grey pants.