Your character look definitively look like Sonic the Hedgehog. I've searched a little on Porcupines and they have fur with hidden quills that rise when they are attacked. They are slow and bigger than a hedgehog with a longer tail. A hedgehog is smaller, form a ball and roll on himself to attack. (As you could see in Sonic the hedgehog)
I could model that drawing very easy. If you want that model, that should be easy. I'll try to find some extra time. I'm not an animator, you would have to find someone to animate and rig it.
EDIT:
Here, I've done a quick sketch very fast, for fun. A Sonic relative I could say, with 2 axes (similar on your first drawing). "ready for battle"
![Smile :)](./images/smilies/icon_smile.gif)
![Image](http://www.clavet.org/files/Storage/hedgehog.jpg)
AS a note. The axes look too small to my taste. What kind of era and technology your character will share? Very futuristic (Almost fitted like "Star Trek - Borg race" or very RPG like "Lord or the ring"?