Infinite

Knuckles: purple eyes, red echidna; kind, though gloomy

Tails: blue eyes, yellow two-tailed fox; kind, sweet, and smart

Amy: green eyes, pink hedgehog; kind, sweet; has a hammer called Pico; like Rouge, she's like a mother to Sonic.

Rouge: blue eyes; white bat; kind, though cunning; like a mother to Sonic, as she cares for him and worries about him like a son

Sonic: emerald eyes, blue hedgehog; kind, fast, hyperactive

Infinite: An anthropomorphic jackal with black fur; long, coarse white dreadlocks; a patch of white fur on his back that resembles ribs; a bushy tail with a white tip and several curved tufts on it; a white muzzle with tufts on his cheeks, a black nose and noticeable fangs; heterochromia: his right eye is blue (with a large white scar running through it, but he sees with this eye), and his left is yellow; a white neckerchief; black gloves with silver patterns (resembling mathematical "greater than/less than" symbols) - they cover sharp claws; pointed metal high-tops in black and silver; his personal infinity symbol is engraved on the red soles.