Shinomiya Kokoa from D4DJ.
It is 100 official pictures and autotags.
Example prompt for stage outfit Kokoa:

shinomiyakokoa, 1girl, one eye closed, skirt, smile, breasts, long hair, black skirt, midriff, pink top, two side up, navel, ;d, open mouth, stage, stgotf

Casual Kokoa:

shinomiyakokoa, 1girl, solo, skirt, long hair, jacket, blush, necklace, brown eyes, bangs, shirt, black shirt, jewelry, two side up, hair between eyes, pink jacket, cslsk

Bikini Kokoa:

shinomiyakokoa, 1girl, swimsuit, solo, bikini, hair ornament, shorts, flower, hair flower, breasts, twintails, smile, white jacket, navel, long hair, gwib, beach, bknsk