1girl, ahoge, bare_shoulders, birthday_cake, blue_eyes, blue_hair, breasts, cake, character_name, cleavage, closed_mouth, dress, food, gengetsu_aya, happy_birthday, holding, holding_food, honkai_(series), honkai_impact_3rd, looking_at_viewer, seele_vollerei, short_hair, smile, solo, upper_body, white_background, white_dress