Arms and Armor of Allagan Origin

[Griffey]

It's still unclear why they wear Allagan gear like Scylla robe. Maybe the design was originally Meracydian, maybe their nations weren't that hostile before and they got them from trade. Nothing but speculations now.

My headcanon is that the garb is Meracydian, and that the bosses who wear them in CT are all Meracydian heroes, captured and brainwashed to serve Allag for all eternity...

...which isn't much of a stretch really. We know that Phlegthorn was a rebel against the empire who met that fate. It's entirely possible that he sought help from the Meracydian Goddess nation, who gave him arms and armour to fight against Allag. I don't think we have much lore on Scylla and Glasya Labolas to back that up.