Nijikki Hinako from BanG Dream.
It is 55 official pictures and autotags.
Example prompt for school uniform Hinako:

nijikkihinako, 1girl, solo, smile, school uniform, dress, looking at viewer, brown hair, short hair, red ribbon, hanasakigawa school uniform, sailor dress, blush, ribbon, purple eyes, double-breasted, long sleeves, pleated dress, buttons