nikaidou tetsuo, nymph (arknights), nymph (sweetness to the heart) (arknights), arknights, highres, 1girl, birthday cake, black gloves, blush, bright pupils, cake, cake slice, closed mouth, clothing cutout, confetti, diamond-shaped pupils, diamond (shape), dress, english text, expressionless, food, fork, gloves, hair ribbon, hand up, happy birthday, heart, holding, holding fork, holding plate, long hair, long sleeves, looking at viewer, official alternate costume, pink eyes, pink hair, plate, pointy ears, ribbon, single glove, solo, symbol-shaped pupils, upper body, very long hair, white dress