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

rinku, 1girl, skirt, solo, smile, open mouth, red eyes, midriff, looking at viewer, thigh strap, headphones, brown hair, belt, jewelry, stage outfit

Casual Rinku:

rinku, 1girl, braid, shirt, blonde hair, white shorts, smile, shorts, solo, belt, open mouth, pink shirt, crown braid, casual

Bikini Rinku:

rinku, 1girl, swimsuit, bikini, blonde hair, twintails, breasts, flower, smile, jewelry, open mouth, necklace, solo, bracelet