That's still using someone else's work for your own benefit. Even if it's what inspired you, the artist didn't draw it for you and your character. It is a character they made, with their story behind it, for their own reasons. But like I said, I can't stop you, so I won't try. I'm just letting you know how I feel about it. I must admit, I have used pics to give a general idea of side characters, but main characters are kinda on their own tier for me. To me, if you can see the pic, you can describe your character in words, adding your own personal touches and flare to make the character your own. But again, I can't make you conform to what I wont, and I would never try and make you. I'm just very protective of my own artistic creations and wouldn't want people using my characters for such things. 'Cept fanfiction, but I doubt that will ever happen with my RP guys :P