firefly (honkai star rail), 1girl, alternate costume, aqua sailor collar, aqua skirt, black hairband, black shoes, blue sky, blush, closed mouth, clouds, cloudy sky, day, flower, grey hair, hairband, holding, holding umbrella, loafers, long hair, looking at viewer, midriff peek, neckerchief, pleated skirt, purple flower, sailor collar, shirt, shoes, short sleeves, skirt, sky, smile, socks, solo, squatting, transparent, transparent umbrella, umbrella, violet eyes, white shirt, white socks, yellow neckerchief, yuuichi yuiko
