The hair looks really good but for the hat, I’d smoothen it out so the faces wouldn’t be seen this much (unless it’s the style you were commissioned to make). Can’t add anything else besides that.
Since editing is broken for me atm I’ll add on, you should add on the stripy things under the two ornaments too (if you want to call them that) since that’s another detail on the hat you’re referencing
Is that a Megumin hat/hair? It looks incredibly good! If you’re helping make a Konosuba game then thats fantastic lol. I don’t see any faults with either one besides the tip of the hat, it seems like a blob it should be a bit more pointy. Y’know like a typical wizard-esque hat.
Keep the curve but make the tip… a tip. you know what I mean?
And if its not meant to be a Megumin hat it still looks awfully similar in some ways. I like it.