Originally Posted by
Eyvind
Those same quests show a woman driven entirely insane by tempering (Loonh Gah's mother). She believes a rock is her daughter, and she plans to give that rock-daughter to Ifrit. The Amalja'a leader says it happens, Ifrit's fires are too strong and it destroys their minds.
I think of tempering like "indoctrination" in the Mass Effect series. The Reapers in Mass Effect can hack biological minds and make them servants, but there's a deterioration effect. Once indoctrination takes hold (and it is also a kind one-way mind-hack from which the victim cannot be cured) the victim becomes increasingly loyal and unquestioning, but also simpler in their thinking and less subtle. The final stage is mindless zombie.
Basic tempering is instantaneous, but there seem to be degrees, and a progression. People go crazy (or crazier). People start to change shape (like Captain Madison is Sastasha Hard). They begin to alter. Tempered Flames can infiltrate things, but by the same token, recently Drowned Limsans announce their loyalty to Leviathan the second you rescue them in Beast Tribe quests, basically ensuring their deaths. Someone with independent reasoning would have laid low, and returned to infiltrate so as to better serve their new god.
Unsurprisingly, there was a subset of fans who were convinced that the protagonist of the Mass Effect was "indoctrinated," and the writers never went that direction. It wasn't a direction for competent writers to go - a cheap twist M. Night Shyamalan twist that bad writers use to make themselves seem deeper and more nuanced than they are. I have faith that Banri Oda is a better writer than that as well.