Hina is this manga's "Shen Wulong"
This might be somewhat of a bold take but I think Hina is already at the top of the verse among women fighters. Some people are still waiting for someone to come "humble" Hina, be the series' Kanoh or Kuroki, but I don't think it's gonna happen. This is not Kengan, the manga didn't start out the same and I don't see it heading the same way.
While Hina might be our main character, she is not the "hero" but has shown signs of being the "villain". A villain who is already overpowered (like Shen) and I think trying to find someone who can match her will be an ongoing pursuit during the majority of the manga.
I've always thought this might be where this series is heading since the start, but my belief is even stronger now that Hina is basically toying with a fellow star children (last panel of chapter 43), and there is a very real likelihood that she has mastered all of Rikudou.