Theory: Sooo... is Zero a shard of Azem?

[Catwho]

Counterargument: I now suspect she was the 13th's shard of Ysayle.

XIV loves to rhyme, and her initial reaction to the Loporrits was an awful lot like Ysayle's reaction to Moogles. ("What..... are these creatures?")

She's got a similar color scheme. Some of that is because Voidsent, obviously, but I suspect even before the Memoria she had gray eyes.

Add in her newfound chemistry with Estinien, and it's my new head canon and the perspective I'll take until proven otherwise.

(I was suspecting Moenbryda for a bit, but the budding personality we see emerging from Zero doesn't really match our beloved Moen.)