Sonic the Hedgehog is a blue anthropomorphic Mobian hedgehog who possesses the power of super speed. He uses this ability to defend his world from the forces of evil, most notably against the tyranny of evil scientist and longtime nemesis, Dr. Eggman. He and the doctor have fought for some time, with Sonic always thwarting every world-conquering scheme the "omelet dictator" has put forward. 

In this miniseries, Sonic is substantially less active in his main, usual heroic duties, his ability to run compromised due to damage from his left ankle as a result of a plane crash and wearing a metallic foot brace because of this, but is still very much present in all four issues. You could say he, in a way, becomes a sorta "dude in distress".

The Sonic voice references in this one to go by are more flexible, so a Ryan Drummond-like, Jason Griffith-like, or Roger Craig Smith-like performance style is completely up to you. But if you would rather not use any of the three and go for more of your own personal take and vocal interpretation on his voice that suits you best, you're free to do that too, which is the most encouraged. Heck, either all four ways are welcome!