Would Heir of Hope turn into a fairy/angel/minor deity/ any other creature strongly connected to belief? But then, that kind of sounds like godtiering itself

Yeah, God Tiering IS becoming a God by itself, but there’s also specific power sets or transformations that are more deity-like than others. It also depends what the Hope is aimed towards, one can Believe in something Holy and Higher and Godly, but much like how Rage can be overthrowing a tyranny, Hope can also be blindly following a cult. So it depends.