Serge

Green Hill: a picturesque tropical world with palm trees, cliffs, blue lakes and waterfalls, and also with a recognizable "checkerboard" pattern on the soil.
Relationships:
Sonic and Surge don't like each other, and there have been fights. Amy and Surge get along very well. Knuckles and Tails also get along well. Rouge and Amy are best friends.

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

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

Rouge: blue eyes; white bat; kind, though cunning

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

Amy: green eyes, pink hedgehog; kind, sweet; wears a red sleeveless dress that reaches to her knees but not lower; has a Piko hammer

Surge - Body: An anthropomorphic tenrec, about the height of Sonic, but slightly taller than Amy, and clearly taller than Tails; Fur: Bright green, with a contrasting black spot on the face and eyelids; Eyes: Angular, turquoise (blue-green) color; Muzzle: Pale peach, with a medium-length black nose, upturned sideburns on the sides of the head; Ears: Tall, vertical, flat; Quills: Several pointed, gathered into a ponytail with a black ribbon with six silver pins on top of the head (with the quills pointing forward); Tail: Tiny, split in two; Teeth: Sharp; Arms: Pale peach skin; Clothing: Two silver earrings in each ear;
A black shirt with torn sleeves; white gloves with visible lining and black cuffs with six silver studs; silver rings on the index and ring fingers; yellow baggy pants with black stripes on the sides, held up by a black belt with a round silver buckle; shoes with yellow flares and double spikes (creating a "ragged" effect, reminiscent of lightning), the back of which is white; on the yellow part there are white straps, black socks, black soles with metal plates and rivets along the edges.