1girl absurdres arknights bare_shoulders bikini black_choker breasts choker cleavage commentary_request cup detached_sleeves hair_between_eyes hair_intakes highres holding holding_cup horns long_hair long_sleeves looking_at_viewer official_alternate_costume open_mouth purple_eyes red_hair rikuguma solo stomach surtr_(arknights) surtr_(colorful_wonderland)_(arknights) swimsuit thigh_strap thighs very_long_hair white_background