hidulume, yuuka (blue archive), yuuka (track) (blue archive), blue archive, highres, 1girl, bare shoulders, black halo, blue buruma, blue halo, blue jacket, blush, breasts, buruma, cleavage, door, hair between eyes, halo, jacket, jacket partially removed, light blush, light frown, long hair, long sleeves, mechanical halo, medium breasts, multicolored halo, official alternate costume, ponytail, purple eyes, purple hair, red pupils, solo, sweat, track jacket