1girl, arknights, bikini, black_bikini, blue_hair, blush, breasts, ch'en_(arknights), ch'en_the_holungday_(arknights), dragon_girl, dragon_horns, flower, hair_flower, hair_ornament, half-closed_eyes, horns, kneeling, large_breasts, long_hair, looking_at_viewer, official_alternate_costume, otsumami_(02mami), red_eyes, red_flower, shadow, solo, swimsuit