Let me know if you know the source, failed to find one.
Edit: Looks like this is by GurumaruHana on twitter.
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The character seems to be Shamiko (Yuuko Yoshida) from Machikado Mazoku (The Demon Girl Next Door).
I haven’t found the artist. Google, TinEye, and SauceNao can’t find anything.
Yes, I recognise the character, but had the same lack of luck when reverse searching.
some reverse image searches led me to this tweet which appears to be the original source.
Brilliant! Updated to credit them.