Goddess Sophia Lore posted.

[Frederick22]

Phlegethons model was reused as trash in later instances as well, don't forget... One quick chat with Rammbroes;

Two points to make from this;

1. It sounds like he was a hero to the people, not a primals thrall... I would assume he rebelled in a more central location, rather than the empires latest domain, so I'm doubtful he had any relation to Sophia or the people who worshiped her. Entirely possible he was from Meracydia anyway, but I'm left wondering how we have the peoples accounts of him were that the case...
   
2. He was altered... People have been speculating for a while that Sephirots growth might have been harnessed to make the Crystal Tower bosses larger, well... I think this might be further proof... The adds in the Sophia fight might well be her thralls, but I think the resemblance to Phlegethon is more to do with the experimentation that led to the augmentations we see in Crystal Towers bosses...

Those are effectively Acheron prototypes in Containment Bay P1T6, would be my guess...

Your explanation has one big flaw, those adds are on the trial of Sophia are elezens and roegardyns. Races of we know perfecly were not part of the allagan empire, that was mostly habited by hyurs.

The preview of Sophia confirmed this, a deity of meracidya worshiped by a multi-race nation

You can make reused assets but not of this kind. It's the same issue we had with the catheral on azys'la, were at first was said to be a used assets but they had to retract and make a good explanation.

Also the archerons we saw on ST were seem to be clones of plegheton, make sence taht the allagans copied his gear for the clones too.
What if he was a hero of the poeple? Maybe he wanted to free his people from the allagan subjugation, has nothing to do to who he worshiped. Besides we know that primals/eikons 's is active no passive.
His hole transformation that he suffered has nothing to with what we are talking about really.

The adds on the trial of sophia are clearly not allagan, so why then are using the same gear that plegethon used?