tsubame (senran kagura), senran kagura, senran kagura new wave, game cg, official art, third-party source, 1girl, arms behind back, bikini, bikini top only, border, breasts, card (medium), character name, closed mouth, day, from below, green eyes, grey hair, hair tie, hand on own arm, harem outfit, jewelry, large breasts, long hair, looking at viewer, looking down, navel, necklace, o-ring, o-ring bottom, outdoors, pelvic curtain, pink bikini, smile, solo, swept bangs, swimsuit, town, twintails, very long hair