This is Akiko Kurata from Confession of Akiko Kurata. It's an NTR work, not my favourite genre but I like the character design.

Her prompts are:

solo, coakakku, mature female, short hair, bob cut, blue hair, blue eyes

Her usual outfit:

cardigan, skirt

Version 1 notes:

Looks ok considering it's using the same process that I had gone through for chisato ninomiya. Make sure to use solo tag. For some reason her hair can be frizzy, lowering strength and cfg seems to reduce that.