These three are all tied together, and i think it's to dowith Xehanorts lost memories(Incidentaly, drop the X, shuffle the letters, you get Rothean, a fairly real sounding name). And that got me thinking: In the Secret reports, Ansem mentions that xehanort was one of the "Exceptions", along with namine and kairi. I think, that Rothean(xehanort BEFORE he lost his memories is what i mean by Rothean, btw) either fathered Kairi, or is closely rlated to her, which is why they are both exceptions.