I thought of this too, however,honestly i felt that venat was in a sense, you. that you were the form they chose, at least for the source, and the other WoL counterparts of you (such as aldbert) were the forms they chose to protect the other shards. since they would be split up, it would make sense that they wouldn't retain their original memories, yet they would retain that burning desire of the heart to do good. not to mention the unusual strength of will and connection to hydaelyn, as it is, in a sense, your higher self.
after all, the ancients are genderless and robed, so their form and gender could literally be anything.
Spoiler: show
a lot of people assume that the missing XIVth member of the Convocation (and Emet's friend) is the WoL and that wouldn't jive with Venat being us, because Venat specifically says the XIVth didn't join either the Zodiark or the Hydaelyn faction. It's possible the XIVth is NOT the WoL, but...c'mon...XIV.
I get the distinct impression that we are supposed to follow the thread of logic saying the XIVth is the WoL and not Venat.
There is also a theory someone posted on reddit that the WoL didn't join either faction because they went off on their own to try to fight the problem themself, like the WoL would do.
And yeah, Gaia looks really out of place. Nomura has to be a special snowflake.