Well uhh it's Sonadow you're shadow (or be anyone-) and Sonic has a crush on you (you guys Asked for this :/ and please ignore the pic-)

Tails or Miles "Tails" Prower hes an Anthropomorphic Fox born with 2 Tails he has a Plane named the "Tornado" Hes an Engineer and he's just 8 years old he has an IQ of 290 or something (You can be anyone)

Hes a Short beaked red Echidna He can Dig,Climb on walls and punch brick pillars hes like 4'10 in height (idk his height) he lives on angel island most of his life (you can be anyone)

amy rose or Amelia Rose Shes Obsessed with sonic she has some Cards idk what they do Shes more like a Cutie shes a Pink furred hedgehog (Be anyone)

Hes a hedgehog with snowy white fur he has telekinesis I think- (be anyone you want) hes also kinda shy

He is sonic's younger self from his classic years who stops Dr Eggman/ Robotnik from conquering the world with the chaos emeralds. He also occasionally time travels to his older self's time to stop Dr. Eggman. he is the arch-nemesis of classic eggman and he doesn't talk at all (You can be anyone from any franchise you can be Amy rose if you want)

Hes thr ultimate life form he has Black and red fur hes a hedgehog Dont confuse him with sonic

He is the Fastest thing alive idk what's his speed (You can be anyone in the sonic franchise)

She's from Super box siege defense