I don't know how many times I have to say this.
Just so you guys know, it is not okay to use/repost my art on this or any other media. It is not okay to take my art for your own personal roleplays. It is not okay to re-name my characters and try to get away with them being your own character. It is not okay to steal art and use it without the artist's express permission. If you didn't draw it? Don't use it. Directly ask the artist first. If they say no, end of discussion. If you get caught? Don't try to cover up. Don't spit out excuses and "I didn't know!"s. Own up to the fact and do what the artist wishes. I don't care if your "friend" claimed it was theirs and that you could use it. I don't care if you found the art from some place that didn't have the artist listed. I don't care if you've "developed a character" that is different from the original. Either revamp the character so they don't bear resemblance to the original, or get rid of them entirely.
If anyone should see my art being used, please let me know as soon as possible. This has happened several times. I've put warnings in the description of my work not to do such things but it still happens apparently. The biggest offender is Google Plus, followed by Facebook. The only places I post my art is here and on my personal/art tumblr accounts. If it's anywhere else? It's not me.