Sir Charles Hedgehog

Sir Charles Hedgehog is a mobian hedgehog and a Knight in the service of the Kingdom of Acorn, having earned his knighthood because of his personal friendship and services to King Maximillian Acorn. After Sonic's parents Bernadette and Jules disappeared, Sonic became especially close with Charles and learned many of his most important lessons from him, as Charles acted like a foster father. Charles' capture and roboticization was the catalyst which led to Sonic's development as a hero.

Charles (Uncle Chuck) should maintain his voice from Sonic Underground's first episode, but once again, feel free to do your own interpretation.