BECAUSE THE PERSON I DREW IS NOT MADARA. this is OBITO. there are some debates that obito survived the falling rocks and became part of the akatsuki as a cool twist. the reason he would keep his left eye covered is because IT'S NOT THERE. he gave it to kakashi when they were younger. but its not obito under the mask. and there is one episode after itachi dies that tobi takes of his mask part of the way so that you can see his right eye, and he looks like an old man. so yes, tobi IS madara.
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By the way i know for a fact that he is Madara. watch the anime because he says himself he is madara.
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HOTNEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEESSSSSSSSSS