Sir Charles Hedgehog, otherwise known as Chuck, is Jules Hedgehog's brother and Sonic the Hedgehog's uncle.  He was the one who created the Roboticizer in order to save his brother's life from his war injuries, but his machine was tampered with by Dr. Eggman and turned him and everyone else into brainwashed robots.  Later on, Chuck was turned back to normal thanks to his nephew's heroic effort and is now working behind the scenes to look into Dr. Eggman's inventions and help Sonic and the Freedom Fighters.

Uncle Chuck has the appearance of an old man, possibly representing him as the older brother or a wise investigator.  With that being said, I would like Chuck to sound older, but only to a degree where he sounds like he's in his late 50's.