rio (blue archive), rio (dress) (blue archive), blue archive, absurdres, commentary, highres, 1girl, armpits, bare shoulders, black dress, black hair, blunt bangs, breasts, bright pupils, chair, cleavage, closed mouth, collarbone, dress, gong e, hair bun, indoors, large breasts, long hair, looking at viewer, low neckline, no halo, official alternate costume, official alternate hairstyle, on chair, red eyes, ringed eyes, sidelocks, sitting, smile, solo, strapless, strapless dress, very long hair, white pupils, window