*Erma Ermine is a character that appears in the Sonic the Hedgehog comic series and its spin-offs published by Archie Comics. She is a mobian ermine and a member of the Arctic Freedom Fighters, and is notably aggressive in nature. While others of the team wanted to deal with threats to their homeland peacefully, Erma was eager to fight from the beginning. However, she has since come together with her teammates in resisting the threat of the Eggman Empire.

Erma is a highly decisive individual who prefers direct, proactive, and even aggressive methods, which has been the source of some bad blood between her and the more pragmatic Guntiver. However, she has come to admire Guntiver's leadership, and even jumped into his arms with joy after their initial victory over the Legion. While still a loyal member of the team, she can be somewhat blunt, impatient and abrasive; not afraid to speak her mind, her attitude sometimes causes clashes with others. Despite her temper, she can also be fairly level-headed and logical, and displays the ability to remain cool under pressure.

Erma has the power to turn invisible, something that is based on real-life Ermines' natural ability to change their fur coat. She uses this ability to sneak up on enemies an attack them by surprise, something that Sonic compared to Espio's own ability.*