Here is one of my characters, Yuuni as a sonic character! One of my inspirations was to see what I can come up with if I combine Doomguy with Blaze the cat... well, here she is!

Character Description:
Height: 4 foot 7 inches
Weight: 180 lbs
Age: 28 (1347 years in the Chaos Realm)

Abilities:
Increased Strength, can lift up to 800 lbs.
Increased Speed, can run at a max speed of 60 mph.
Levitation shoes allow her to increase mobility, giving her the ability to circle-strafe and perform unpredictable maneuvers
Holo-weapon pack grants her access to nine different firearms/weapons to use at her disposal while carrying large amounts of ammo for each.

Equipment:
Pistol, Shotgun, Super Shotgun, Machine gun, Chain-gun, Rocket Launcher, Plasma Gun, Rail Gun and the Chaos-breaker Cannon

Bio:
For most of her life, she roams the Chaos Realm, a realm very few even know about. Some might be curious to set foot inside the realm where chaotic energies flow, but what lies within is a realm full of suffering and eternal damnation. It is a hellish landscape where monstrous creatures feed off of Chaos energies and serve the Chaos Lords bent on dominating the galaxy. The energies of Chaos grants the recipient great power, but at the price of it being addictive and the user losing most free will, pledging loyalty to the Legion of Chaos. Refusing to accept the gift of Chaos power, she and a small group of like-minded warriors have fought against the legions of Chaos, increasing their strengths, stealing their technologies and stopping the Chaos legions from opening portals to invade other worlds.

Yuuni is no stranger to combat, often entering the fray against insurmountable odds. Selfless and willing to go at great lengths to save her comrades, she is the de-facto leader of a group of warriors calling themselves the green knights. Innocents, civilians and comrades see her as the last hope for the living to survive, while her enemies dread uttering her name. This is especially true when she faces against the legions of chaos, for they would be reduced to red paste in her wake. The mere presence of her strikes fear into the hearts of the most vile and wicked, as she will show no mercy. In combat, her ferocity and skills are unrivaled with most of the chaos legion.

The legion, however, figured out if they couldn't kill her, they could simply banish her. Three witches of chaos lured her to a portal, in which she is flung into the living world, cut off from her comrades and unable to predict where the legion might invade. She now roams the living world, finding any way to return to the chaos realm, kill the witches and permanently seal the two realms forever.