Kanon Nakajima from Ultra Despair Hagakure.
You'll ideally want to use tags with this. Adding "danganronpa sprite style" without the quotation marks should push a little closer to the in-game sprites of the mainline games.
The prompt for her main characteristics (and franchise tags) are: danganronpa_(series), danganronpa_another_episode:_ultra_despair_girls, komatsuzaki_rui_(style), danganronpa sprite style, nakajima_kanon, 1girl, solo, black_bow, blonde_hair, breasts, frilled_bow, frills, hair_bow, hair_ornament, hairclip, medium_breasts, medium_hair, yellow_eyes
the additional tags for her usual outfit are: brown_shirt, collarbone, jacket, skirt, necktie, open_clothes, open_jacket, pleated_skirt, shirt, shirt_tucked_in, white_necktie, white_shirt
General Notes
This came out far better than I expected. There's really not much official material featuring her. However, some searching around turned up more fan content than I'd expected.