Revelations from Patch 5.1

[Alleo]

It is explained in that cutscene that Tempering requires a person to have their Elemental Alignment in their Aether to be altered towards a specific element for the Tempering to work.

For Example, Titan tempering requires to put a being's Aether into a strong Earth Element alignment thus eventually their Aether alignement will slowly become nothing but Earth Element.

It basically means the process of turning into a Sin Eater is the same Process of becoming Temper but with a different Element.

The cure method is not to simply shift light alignment back to normal state but to shift the entire Aether of a Being back to Normal State either from Fire, Water, Light, Darkness, and etc.

Hm must have been long ago because I honestly dont remember them talking about tempering that way. I only remember that people with strong will can resist tempering a bit longer but will also succumb to it over time (yet at the same time other primals need to actively use an ability to temper..) and that people with echo may not only resist it but can overpower them. Yet when we meet the Lightwardens its not our echo that protects us from their Light when we consume it but our blessing which are two different things.

Another difference is that tempered people often still keep their own look but are just mindcontrolled while the ones with light will always lose theirselves and turn into monsters. You just needed one attack from one higher sin eater and you are done for. While tempering seemingly needs to be overdone to truly turn someone into a monster. Why such differences between these? And then we have the void sent which are also turned into monsters while those tempered by Zodiark are keeping their normal form and some sense of self.

About Angelo and Alisaies plan:

If it truly just needs to balance out the aether then can Alisaie even do something with Angelo? Because as far as we know right now that familiar was there to start the flow of aether again but seemingly that should only function with people that have too much light because its just their aether (and mind) that is stagnating. But if you have someone tempered by Titan this should not work since its not too much Light in that case. So what would they need to manage it there?

I am in the end not sure if this is truly a solution for tempering and I am not sure if I would like it to be that way either. On one side it would be great to have something to save people on the other side it will make primals even less dangerous and takes one dramatic part of the story out of it.

[EdwinLi]

Hm must have been long ago because I honestly dont remember them talking about tempering that way. I only remember that people with strong will can resist tempering a bit longer but will also succumb to it over time (yet at the same time other primals need to actively use an ability to temper..) and that people with echo may not only resist it but can overpower them. Yet when we meet the Lightwardens its not our echo that protects us from their Light when we consume it but our blessing which are two different things.

Another difference is that tempered people often still keep their own look but are just mindcontrolled while the ones with light will always lose theirselves and turn into monsters. You just needed one attack from one higher sin eater and you are done for. While tempering seemingly needs to be overdone to truly turn someone into a monster. Why such differences between these? And then we have the void sent which are also turned into monsters while those tempered by Zodiark are keeping their normal form and some sense of self.

About Angelo and Alisaies plan:

If it truly just needs to balance out the aether then can Alisaie even do something with Angelo? Because as far as we know right now that familiar was there to start the flow of aether again but seemingly that should only function with people that have too much light because its just their aether (and mind) that is stagnating. But if you have someone tempered by Titan this should not work since its not too much Light in that case. So what would they need to manage it there?

I am in the end not sure if this is truly a solution for tempering and I am not sure if I would like it to be that way either. On one side it would be great to have something to save people on the other side it will make primals even less dangerous and takes one dramatic part of the story out of it.

As I said the cure method is to focus on the Aether itself rather than one Element of the Aether. You are focusing too much on the belief that it will only work on Light Element of the Aether but that same cutscene already stated the method of restoring the flow of Aether required stabilizing the Elemental Alignment of the person's Aether into equalibrium for it to start flowing normally again which also then lead to Alisaie realizing temper people tend to have the same issue when they become temper as their Element Alignment is shifted from Equalibrium into a specific Element such as Titan's Temper shifting towards Earth Element which then lead to Alisaie mentioning this same method may work as well on her Kobold friend since when he summoned Titan, he became Temper by titan as a side-effect of the summon thus leading to his constant struggle to recover from the death of his parents as the Titan Temper is keeping him in a state of despair.

Primal effect of temper can be stopped at a certain point because the Primal controls the extent of the effect thus why only those chosen may be turned into a Monster focused on a Specific Element such as Leviathan's minions being Temper people who turned into Water Element creatures due to having their Aether greatly shifted towards Water.

Sin Eaters are basically Temper without a Master thus they are basically Wild Tempers. Without a Master to control the extent of the effect, they will continue to change into Sin Eaters. However, with a Master their transformation can be stopped at a certain point such as it was with Arbert's Companions in the Job Role Quest where they were made into Sin Eaters by Vauthry thus Vauthry made certain their transformation stopped at a point where they still at least kept their original appearance with a bit of Sin Eater skin on.