So the rules of succession is any heir can challenge the current head to a physical fight, if they ring some kind of magic bell? Seems like a chaotic method.
And look at where that got them in the first place.
Is it implied the setting is a matriarchal society? Because otherwise there's literally no way the king would accept a child usurping their parent's throne during peacetime.
Fuck all those servants that did nothing while the girl nearly offed herself. When were you when the bitch of a maid she froze was stealing her shit???