I contacted the real Chibi from Pixiv (who happens to have a DeviantArt account ->
~chibi-s) and she confirmed what I expected from your clear copy-paste from her Pixiv account: you are an art and identity thief. It's sad that you even got a DD for stealing someone else's work.
Please, have some respect for the artists and don't do this to them. They work hard to reach their level, and their drawings are the work they put so much effort into. Stealing them to claim them as your own is not nice at all.
I hope you work hard from now on to reach a level you're satisfied with. It's worth in the end, so try your best and don't do this again, please.