I am the Reverser! Mark said when he was akumatized, except he wasn't Mark anymore he was now the akumatized villain Reverser. Someone caused him to be akumatized, and his akumatized item was his notebook. Although, the notebook was now a black and white paper airplane. Reverser was also black and white, the hood somehow not falling off of his head. He hasn't noticed you yet, thankfully.