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

yashiorui, 1girl, solo, skirt, plaid, short hair, jewelry, looking at viewer, breasts, plaid skirt, belt, closed mouth, frills, black hair, long sleeves, necklace, hair between eyes, sweater, bangs, asymmetrical hair, buttons, cslsk

School uniform Rui:

yashiorui, 1girl, solo, school uniform, skirt, short hair, looking at viewer, serafuku, pleated skirt, black hair, tsukinomori school uniform