Some of Sonic's closest companions who could be considered allies include:
* Tails: A two-tailed fox with incredible mechanical skills, known for his loyalty and ingenuity.
* Knuckles: A red echidna with immense strength and a fiery temper, who often acts as a guardian.
* Amy Rose: A pink hedgehog who is deeply infatuated with Sonic and is fiercely loyal to her friends.
While these characters are all close to Sonic and often help him on his adventures, none of them have a distinct "sidekick" role.