[shadow1296]

Originally Posted by Algester

the theory is interesting but we will see if it holds true to what you think, for all the background setting exposition we have is that Est and Areshia rose to an accidental occasion where spirits ran rampant and destroying properties and a lot of battles were occurring here and there, who knows man who knows for all I know Ariesha seems to be someone straight out of a "tales of" protagonist role
but here my take on Est

Spoiler:

Est as a sword was known as the demon slayer, meaning yes she can vanquish demons however seeing the battlefield for the blade dance finals spirits can also have lingering malice even when dead, this is where the curse of Est comes in, seeing that she can vanquish demons but has no other way of purifying their malice she absorbs them, let's also take note that Ariesha was'nt really educated in terms on spirits, but was simply forced by the setting to keep on fighting meaning she would'nt also know how to purify spirits or appease them, to a lesser extent before and after she kills them, simply the amount of spiritual malice Est has been absorbing reached to a critical state where she couldn't keep them contained and of course all of that stuff has to go somewhere, and it just happens that the world wasn't also an option, so it as the next best thing the contractor

that is also true, but if this was the case then

Spoiler for :

then est worrying about the curse effecting kamito is her worrying about some that might never happen because that mean all the malice she absorbed was transferred to ariesha causing and kamito hasn't used est to kill so she hasn't absorbed malice since volume one when kamito killed that demon and est curse wont cause kamito's death because I would venture to guess now that he has restia, he will most likely use her when it comes to killing the elemental lords