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

arisa, solo, 1girl, twintails, hair ornament, skirt, x hair ornament, looking at viewer, brown eyes, shirt, black shirt, blonde hair, long hair, open mouth, floral print, collarbone, casual

School uniform Arisa:

arisa, 1girl, solo, twintails, hanasakigawa school uniform, x hair ornament, hair ornament, school uniform, dress, blonde hair, smile, brown dress, ribbon, long sleeves, long hair, blush, looking at viewer, sidelocks