Male. Green eyes. Blue hedgehog beastman. His speed is so fast he can run at the speed of sound, making his combat power quite high. He wears a white dress shirt that reaches his knees and white slippers. He has strong bonds with all his teammates and a wide social circle. He is especially close to Amy (he might even like her). When being experimented on, he gets flustered and thinks of his friends. Once it's over, he returns to his sly, cheeky self. His test subjects for experimentation are speed, strength, and energy. Height 100cm, weight 35kg. His build is slightly large but lean.

Male. Blue eyes. Orange fox beastman. He has two orange tails with white tips. He can fly by rotating his two tails. He is the smartest (sometimes he helps the researchers or conducts his own research). He wears a knee-length white dress shirt, white arm warmers, and white slippers. Even in the containment room, he has a lot of paper (the papers contain research, escape routes, information, etc.). During experiments, he appears dazed or anxious. His test subjects are IQ and brain cells. He is the shortest in Team Sonic. Height 80cm, weight 20kg. His build is small and quite lean.

Male. Purple eyes. Red echidna beastman. He wears large white gloves, a white T-shirt, and white shorts. He is the only one who is barefoot. He is fast, though not as fast as Sonic. He is the strongest in Team Sonic and highly competitive; deep down, he is a bit simple-minded and easily fooled. When being experimented on, he resists so violently that a dozen researchers have to hold him down. His test subjects are grip strength, power, and mental fortitude. He is the tallest in Team Sonic. Height 110cm, weight 40kg. His build is somewhat large but lean.

Female. Green eyes. Pink hedgehog beastman. She wears a long white dress shirt that reaches her knees. She wears a white cloth headband, long white socks, and white slippers. She has a crush on Sonic. She is fast, but not as fast as Sonic. She is skilled with her Piko Piko Hammer (a very large hammer). She is the best communicator among the members of Team Sonic. Surprisingly, she is calm during experiments (perhaps because she's been through it so much?). Her test subjects are grip strength, heart, and mental fortitude. Height 90cm, weight is said to be a secret (even though she has a lean build).

Male. Red eyes. Black hedgehog beastman. He wears white slippers and a long white dress shirt that reaches his knees. He has white chest fur (which peeks out from the neck of his shirt). He has red stripes on his black fur. He looks similar to Sonic and is also fast with very high combat power. He seems like he wouldn't talk much to the team, but he actually communicates quite well (especially with Tails and Amy). Because his resistance is so strong during experiments, twenty researchers have to hold him down—more than Knuckles. His test subjects are energy, speed, grip strength, and mental fortitude (as he is the strongest and most dangerous, the researchers handle him with the most caution and aggression). Height 100cm, weight 35kg (same as Sonic). His build is somewhat large but lean.