Ace is Sonic's descendant, due to this, the poor kid's being hunted by Sage's troops, who killed his family. He might lack Sonic's speed but makes up for it by being especially gifted with his Extreme Gear, the one Sonic used in Riders, which was passed down generations.

Sorry if the background looks a little awful, this piece as a whole was kinda rushed because it was 2 AM when I finished it.

Sonic the Hedgehog belongs to SEGA and Sonic Team