Finally I can submit this! This one's old, and I haven't got the chance to post it!
This is Erza when she was still a slave, being tortured.
Actually I was inspired by a random sketch I made in my physics textbook, I just redrew it (it was damn hard to find an empty space in the book)
Fairy Tail (c) Hiro Mashima
Fanart (c) christasydney13
Tools: Copic, watercolor