It be her, from Tokyo Clanpool

shared:

natsumekannuki, orange hair, long hair, tied hair, ahoge, blue eyes, medium breasts,

defaultclothes, white shirt, long sleeves, blue armband, defaultskirt, black skirt, ribbon, bowtie, black kneesocks, white boots,

altclothes, sphere_hair_accessory, black top, frilled skirt, altskirt, exposed midriff, navel, black gloves, detached sleeves, white kneesocks, black shoes, sword,

bikiniclothes, hair_flower, black bikini, swimsuit, side-tie_swimsuit, side-tie_bikini_bottom, bikini_bottom, jewelry, bracelet, sandals, water_gun,

underwearclothes, frilled bra, stripped bra, frilled, stripped panties, underwear