These aren't personae they're the same character. DaVinci list her adult body during the lostbelt prequel and is using the child body as the main control vector for the shadowborder.
How so? They aren't two separate psyches they're the same person just in different bodies. Fuckery like that can and does happen all the time in the fate franchise
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There is in fact a tag for that! There's 'dual_persona' for 2 versions and 'multiple_persona' for 3 or more.
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