She might be one of the most complex characters in the Sun and Moon series but the only actual moment she received was her moment with her mother due to Tapu Fini’s mist. Mallow is the only one of Ash's companions to have deceased parents, and her upbeat personality shows tenacity. This makes for a very well thought out character with a strong arc. Still, very few episodes focused on her development since there were many characters in the series. The only character that has a deceased parent has to work at the restaurant to achieve her dreams and help her father while also attending and doing well in school makes for a powerful persona. It is wasted potential, but let's hope she might join Ash as a companion in the next series if Pokémon brings back the adventure style.