Udagawa Ako from BanG Dream.
It is 120 official pictures and autotags.
Example prompt for casual Ako:

udagawaako, 1girl, solo, skirt, twintails, red eyes, purple hair, smile, necktie, plaid skirt, grin, frills, red necktie, red skirt, detached sleeves, bangs, looking at viewer, plaid, frilled skirt, long hair, black shirt, corset, shirt, cslsk

School uniform Ako:

udagawaako, 1girl, solo, skirt, necktie, jacket, twintails, school uniform, red eyes, purple hair, plaid skirt, striped necktie, smile, plaid, looking at viewer, bangs, pleated skirt, black jacket, shirt, blazer, striped, collared shirt, long sleeves, drill hair, purple skirt, winter school uniform