Sonic the Hedgehog

Sonic the Hedgehog is the main character of the popular video game series of the same name as well as Sega's mascot. Sonic's rival in the gaming industry used to be Mario, but now they are seen as friendly competitors.

Sonic is known for his supersonic speed (hence his name), and his laid-back and cocky attitude towards serious situations. His arch-nemesis is Dr. Eggman, but much like Mario and Bowser, Sonic always seems to the part his plans, no matter how hopeless or dire the situation may be. Sonic's best friend is Tails, who at times acts like a brother to Sonic and aids him in any way he can.

Personality
Sonic is oftentimes shown as a character who wants nothing short of adventure. He absolutely enjoys adventure, and goes on one every chance he gets. If nothing interesting is going on, he flat-out bolts. He is always fun-loving and is always trying to make the best of things, and is always willing to help others. He is incredibly determined to do the greater good, and is always described as hating evil just as much.

Abilites
Sonic's main factor is his super-sonic speed. He can run at five times the speed of sound and blast through enemies with no problem. However, he is also known for being able to use the chaos emeralds to turn into super-sonic, which is faster, stronger and has the abilty to fly. The downside is he needs a lot of rings to transform, and the super form takes away much energy. He has also been shown to transform into other forms (such as hyper sonic, dark super sonic and dark spine sonic), but most of these were one-time transformations.

Sonic's main weakness is the fact he can't swim (except for in Sonic Colors). This has been used against him multiple times.