Pretty much everything
@*TwilightNight* already said, especially about characters not needing to be able to fight to be a fully fleshed out character.
Yeah, back then a girl protagonist would have still a big issue for some folks.
This is still an issue in game development. I'm sure there are other examples but I know director Yoko Taro said that he, at first, struggled to get a female protagonist for Drakengard 3 which was released in 2013 (although I just realised... wow, that's seven years old already). This was a sequel in a super niche series that likely appealed to the sort of demographic who wouldn't care about the protagonist's sex anyway. I'd hope KH wouldn't have this issue nowadays, but none of us fully know what goes on behind the curtain.
If everything else in the original Kingdom Hearts had been the same, I couldn’t see Kairi working nearly as well as a protagonist as Sora. The main draw of Kingdom Hearts back then was the idea of exploring Disney worlds in this immersive, three-dimensional way with a unique story and Final Fantasy embellishments.
Sora is (was) a normal kid. Gets a magical weapon, boom, off on a magical adventure through the universe to do something as simple as find his best friends. He’s a nice audience surrogate to witness the world and events that unfold within. Most players will find him relatable even if it's just as 'some random kid'.
Kairi’s
not a normal kid and never has been. She comes from another world, of which she has no memories
(though I was under the impression this was originally just due to her being very young?), and is a Princess of Heart. There’s lot more baggage that comes with having her as the protagonist. (Unless they swapped it up and just made Sora a Prince of Heart with memory loss, but in that reality he’s probably the one who exists solely to pine over/be pined for by Kairi, and other versions of ourselves are debating whether Sora should get his own KH game, haha.)
Whilst I don't think she would've been as good a protagonist as Sora
at the time Kingdom Hearts began, in retrospect I definitely think Kairi had the
potential to be a better, more interesting protagonist. Exploring her existence as a PoH, what that means, why she's the only one with a Keyblade, if this means she has to defend her fellow Princesses from the forces of darkness/anyone wanting to exploit the PoH’s power could’ve provided us with interesting character progression if she had been KH's protagonist. Heck, Chain of Memories could've even been how they explored her forgotten past. But that's not the reality we live in.
Personally, I like Kairi, though only a little bit and it took me until KH3 to start actively liking her. Before that I was ambivalent—she just existed and I was all, “Okay”. Like Swing said, she was basically just a prize for Sora. Either that or a plot contrivance on legs.
I would like to see Kairi get her time in the spotlight, however that may manifest, because let’s face it: Kairi isn’t going anywhere. Regardless of whether or not Nomura should get rid of her, have written her better from the start, made her the games’ main protagonist or whatever else is irrelevant. She’s too important to Sora to just be vanished from the series without rhyme or reason. The only way I could see Kairi being removed is if she literally died/was killed permanently, which ain’t gonna happen. (I mean if Nomura ever has the balls to
actually kill off a KH character, especially someone like Kairi, more power to him.)
If she
must be here, make her being here
worthwhile. Personally, I’m hopeful she’ll get more attention going forward—but to what extent? That is the crux.
This has been another public political broadcast from the Doesntknowwhentostoptyping Party.