Its been discussed earlier in the thread the prospect of her own Disney partners like Minnie, Daisy, Pluto, or Oswald. Also she is both a keyblade wielder & a Princess of Heart. The crazy thing with Kairi is she could pretty much be a mary sue with that much power if she weren't being buried so much.Kairi couldn't have a game on her own without Donald and Goofy coming along. She's just not enough of a character to stand on her own, She unfortunately needs to cheat.
If it's her game, then she shouldn't be getting overshadowed by more powerful party members. Disney characters won't steal the spotlight.Eh, I'd rather have Axel or Xion as companions rather then Donald and Goofy. Although, that begs the question of how she would even get to other worlds. Unless of course she gets her hands on the star shard (thats probably not the actual name) that Mickey had in BBS.