taira (amlilith), hoshino (blue archive), seia (blue archive), blue archive, highres, 1girl, ahoge, armpits, arms up, blue eyes, cosplay, covered navel, hair bobbles, hair ornament, halo, jacket, long hair, one-piece swimsuit, one eye closed, open clothes, open jacket, pink hair, pink halo, seia (blue archive) (cosplay), smile, solo, swimsuit, thigh gap, thighs, twintails, white one-piece swimsuit, yellow jacket