Quote Originally Posted by Packetdancer View Post
The twins might take a bit more work, since I'd be shocked if most gear had a variant for the 'Elezen youth' body; players can't use it, so there's no reason for it. (Plus it seems that the twins share a body—along with every other Elezen child you ever encounter. If you examine the game's resources in a model view, I'm fairly sure difference in body shape between the twins is part of Alisaie's outfits, not the actual character model. Which means even if outfits might work on Alphinaud with minor tweaks, Alisaie would probably require custom ones.)
Shadowbringers shifted from giving them completely custom models to repurposing standard gear.

Alphinaud is now using gloves that look to be a scaled-down version of the adult Elezen model, and - while I haven't actually compared them side by side, I'm fairly sure it's changed the size of his hands as a result.

Alisaie is using a standard tunic now (plus the cuffs from her Stormblood coat which are probably part of the hand model). Presumably they just take the adult female version and shrink it down to fit, maybe with some tweaks but not building from scratch.

Still, even if it's technically simple, it may also be a character design thing - keeping them with one or two distinct recognisable outfits.