This 11.5 year old has been stealing artwork from ~ShimiArt
, and many more, recoloring them poorly, and adopting them out.
The owner of this blogspot is on deviantART. If they've stolen your works and recolored them, I'd try and approach them calmly and politely, but considering they're just a child, she's more than likely going to scream at you because she thinks she's being 'bullied' when you ask her to remove your stolen and recolored works. That's just how this person works. I've had first hand experience.