1girl, alternate_hair_length, alternate_hairstyle, balloon, black_thighhighs, blonde_hair, blue_eyes, breasts, brown_headwear, deerstalker, dress_shirt, happy_birthday, hat, high-waist_skirt, holding, holding_balloon, hololive, hololive_english, large_breasts, long_hair, miniskirt, mustache_print, necktie, open_mouth, plaid, plaid_skirt, pleated_skirt, red_necktie, shirt, short_necktie, skirt, solo, thighhighs, two-tone_necktie, v, virtual_youtuber, watashishi, watson_amelia, watson_amelia_(1st_costume), white_shirt, zettai_ryouiki