Rotor the Walrus

Rotor the Walrus is one of the main protagonists in the Sonic the Hedgehog comic series and its spin-offs published by Archie Comics. He is a Mobian walrus and a key member of the Freedom Fighters, serving as one of their main inventors, usually working alongside fellow brilliant inventors Tails and Professor Charles the Hedgehog to create the best tech they can for their friends and allies. Using his skills and knowledge of technology and mechanics he is able to provide the Freedom Fighters with an edge against the mad genius Dr. Eggman and his Eggman Empire. He usually acts as an informant, providing data and technological assistance when his team needs it.

Canon

 * Mark Ballou (Sonic SatAM; season one)
 * Cam Brainard (Sonic SatAM; season two)

Fanon

 * Rainn Wilson

Iago PUC

 * Rotor appears in James Cameron's Sonic Cinematic Universe, portrayed by Rainn Wilson through voice and motion capture.