Asahi Rokka from BanG Dream.
It is 100 official pictures and autotags.
Example prompt for casual LOCK:

asahirokka, 1girl, solo, green eyes, glasses, blue hair, hair ornament, black-framed eyewear, hair scrunchie, floral print, scrunchie, looking at viewer, long hair, dress, hair over shoulder, long sleeves, print dress, hair between eyes, collarbone, red scrunchie, bangs, cslsk

School uniform LOCK:

asahirokka, 1girl, solo, green eyes, skirt, glasses, necktie, jacket, smile, school uniform, looking at viewer, blue hair, green skirt, scrunchie, pleated skirt, black-framed eyewear, hair ornament, plaid, hair scrunchie, shirt, grey jacket, striped necktie, red scrunchie, striped, blazer, haneoka school uniform