小 + flower/plant character = stock affectionate name pattern in Chinese (compare
小梅,
小桃,
小兰).
葵 specifically evokes the sunflower
向日葵 — bright, cheerful. In subtitle corpora it most often translates Japanese names like
葵 (Aoi) or ひまわり (Himawari, e.g. Boruto's sister in Naruto).