Maruyama Aya from BanG Dream.
It is 100 official pictures and autotags.
Example prompt for casual Aya:

maruyamaaya, 1girl, solo, pink hair, dress, floral print, pink eyes, bangs, bracelet, print dress, jewelry, long hair, bag, looking at viewer, sleeveless, sleeveless dress, frilled dress, frills, blush, hair down, cslsk

School uniform Aya:

maruyamaaya, 1girl, solo, hanasakigawa school uniform, pink hair, school uniform, brown dress, pink eyes, looking at viewer, double-breasted, dress, buttons, long hair, bangs, sailor dress, blush, hair down, long sleeves, red ribbon, ribbon, collarbone, neck ribbon