2girls, animal_ears, arknights, bare_shoulders, black_shirt, black_skirt, cat_ears, champagne_flute, cowboy_shot, cup, drinking_glass, dual_persona, ears_through_headwear, feather_boa, fur_trim, heidi_(arknights), holding, holding_cup, indoors, long_hair, miniskirt, multiple_girls, parted_lips, pink_hair, purple_eyes, red_headwear, shirt, skirt, standing, welt_(kinsei_koutenkyoku)