Hey there friend ":] I don't mean to be rude, but I think it'd be best if you had your own art & character as a reference rather than someone else's ! Character theft, especially for artists who work very hard to create original and interesting characters, is not something to be taken lightly and has hurt lots of people.
It may look like your OC, but it is not yours. Unless you have explicit proof of the artist agreeing to let you use this piece of artwork, I suggest you take it down.
I am by no means trying to do the staff's job for them, neither am I trying to embarrass & yell at you. I am an artist concerned for another's work.
