Sonic the Hedgehog

"What you see is what you get! Just a guy that loves adventure! I'm Sonic the Hedgehog!" -Sonic, Sonic Adventure 2 Sonic the Hedgehog is a blue anthropomorphic hedgehog gifted with the power of super speed. He has a carefree, chill, kicked-back attitude most of the time. Despite this, he has proven himself to be one of if not the strongest and most powerful entity in existence.

Early Life
Sonic's early life is a true mystery, even to the hedgehog himself. Earliest reports of his existence say he just appeared one day on South Island, in the midst of Eggman's (at the time, Robotnik's) war against the greenery and freedom of the island. His heroics and sudden appearance inspired many heroes during the Great Eggman War to appear at the Resistance's worst hour to take back the fight. In a sense, Sonic was a predecessor to what would come to be known as the Guardian Angels years later. Although, some have said that there is a conspiracy afoot. Although Sonic retains the general demeanor, basic appearance, and same memories he always has had, some could swear that Sonic is not the same blue hedgehog that turned the tide of Eggman's control over South Island all those years ago.

Abilities
Sonic has the power of super speed. Estimates of his top speed range from the speed of sound, to the speed of light and beyond. However, he is often aided with Ring energy, Hyper-Go-On power, Chaos energy, or others with every living being's power of Double Boost to go faster than is possible with his own two legs.

Sonic is demonstrated to have super strength, having the strength to break open metal with his spines. In Sonic's Hourglass, he is shown to effortlessly apply enough force to break through skin and bone just by stepping down hard enough. While much of Sonic's strength lies in his lower body, he is also hinted to have a lot of upper strength as well.

Sonic has also shown a myriad of super powers going beyond superhuman abilities. He can shoot himself forward at targets even against the force of gravity, be it monsters, robots, or even people, in a move called the Homing Attack. He can also Light Speed Attack and harness Chaos energy among other things.

Miles "Tails" Prower
Sonic and Tails have been best friends for a long time now, having met in the Mystic Ruins a long time ago. Since then, they have been on many adventures together. Some say that Tails is Sonic's first ever friend.

Knuckles the Echidna
Knuckles is Sonic's other best friend. While their relationship used to be that of a friendly rivalry, it could be said that they have been close friends ever since the Neo Period.

Eggman
Sonic and Eggman are mortal enemies. Although, Sonic will sometimes hint that the doctor was once a good friend. How they became enemies is yet unknown.

Sonja Orglace
Sonic's relationship with Sonja differs based on the outcome of Sonic's Hourglass. But if the good ending is to be the focus, Sonic deeply regrets not admitting his romantic feelings for Sonja sooner. Sonic misses Sonja, and this will be a recurring issue throughout the series.