Board Thread:Questions and Answers/@comment-76.225.56.101-20160303033214/@comment-2168633-20170915131834

If the official Japanese spelling of her name is Ochaco and it isn't a mistake, then we should go with that regardless of what is most well known. As for VIZ, the reason why their spelling is used in many cases is because arguably they should know what they are talking about. However as has been showed numerous times in the manga itself, they do make mistakes in their translations.

So I don't really see what the argument here is anyway? if we know what the Japanese spelling of her name is then there really isn't a problem.