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

hikawahina, 1girl, solo, braid, green eyes, dress, aqua hair, side braids, looking at viewer, jewelry, necklace, white dress, plaid coat, blue coat, collarbone, twin braids, short sleeves, hair bow, pendant, bow, cslsk

School uniform Hina:

hikawahina, 1girl, solo, grey jacket, skirt, school uniform, necktie, green eyes, braid, jacket, side braids, plaid, blazer, striped necktie, plaid skirt, pleated skirt, collared shirt, shirt, haneoka school uniform