maru (marg0613), haruna (kancolle), rx-78-2 gundam, kantai collection, absurdres, highres, 1girl, bare shoulders, beam rifle, black hair, blue one-piece swimsuit, blush, breasts, brown eyes, collarbone, competition school swimsuit, cosplay, covered navel, cowboy shot, dated, energy gun, hair ornament, hairband, hairclip, large breasts, long hair, looking at viewer, one-piece swimsuit, rx-78-2 gundam (cosplay), school swimsuit, shield, smile, solo, swimsuit, twitter username, weapon, white background