I'm glad you're enjoying the game!
I am not the developer for InfinityRPG. InfinityRPG and this game were both inspired by a game called Inflation RPG. It was released 10 or so years ago and many games have come out using Inflation RPG's core roguelite mechanics.
Hina's introduces more interesting Equipment choices than Apolonia or Stan. You have more agency to choose how you want to build her. You can just use the most expensive Equipment if you don't want to think too hard about how to maximize her power. It'll be a bit slower, but still good enough to win.