Mighty the Armadillo is a Mobian eastern armadillo who takes up residence in the mountains of Angel Island. He has known Sonic the Hedgehog since his childhood, though after their first adventure together they did not meet again for roughly six years. He spent many years of his youth wandering until it brought him to Angel Island by Knuckles and Vector. He is one of the original members of the Chaotix, and has fought side by side with them in numerous battles, and would also back up Sonic's Freedom Fighters.

Mighty is not particularly aggressive, but he enjoys physical activity and is willing to fight for a good cause, especially for the safety of the weak or small. He is extremely protective of his allies, often quick to shield them or ensure they're uninjured. He is extremely protective of Ray the Flying Squirrel, who is basically like a younger brother to him. At times when Ray is in serious danger, Mighty flies into a terrible and uncharacteristic rage. Mighty holds no grudges and is able to get along with everyone, trying to see the good in others and is somewhat sensitive of hurting their feelings.

Mighty's voice is completely up to interpretation. However you feel Mighty should sound, go for it.