Miles "Tails" Prower, Knuckles the Echidna, Starlight the Kirila and, of course, Sonic the Hedgehog.
Because it's pretty obvious.
Really, really obvious.
Anyway, my avi is Cream in Triple Trouble style. Made it myself, because I think I'm the only person that likes her, which is due to Kirby 64 and Yoshi's Story screwing my childhood over and making me like adorable things for all eternity.