@NotaNuffian character's from the Quintessential Quintuplets. If you are as cultured as you say you are, you should be able to find her with the name alone.
Pps. Just scrolled through with tags like nino nakano and looking at viewer yielded no result in Gelbooru and Rule34, so who wants to waste their lives to be a free samaritan?
Here, trade one porn for another.