Who is she, and where is she from?

To me, she loos like Rawberry from an RPG game called Grey Garden but I could be wrong...

I THINK it's an OC of the user ASK on pixiv
link

The creator is from China so everything on their page is in Chinese, sadly I decided to take French instead of Chinese in school so I'm not 100% if this is from an anime hoặc not, but based on the tag + the fact they seem to have a reference sheet up for the character I'm assuming it's an OC.