Concerning the death of a specific character (DT Spoilers)

I've been looking around and thought I should ask here where we seem to have more lore-bois (gender neutral). How the hecc did Cahciua die? I know it wasn't age, but like, I don't remember anyone asking or her telling. Is there a side quest I need to do? It kinda feels like important information.

We are likely left to speculate.
We don't know how old, as.
SPOILERS (CANT CAUSE MOBILE)

We don't know what her actual age was/is.
Except clearly more mature than Eren.

We don't know when she got Savefiled in the 3x10 years she was within the bubble.

But regardless, it's clear that her form that showed her happiest, regardless of knowing her circumstances is that of someone with "agency"

But knowing her "Groups" Agenda.
We can make some guesses.
(as they also have a stump.)

It's not said.

It could be old age, maybe she was already very old (multiple centuries) during her travel with Gulool Ja Ja 80 years ago. It could be sickness or being killed by some monsters (I can see her accepting the regulator but not wanting to use soul as safeguard against death).
At the very least, she seemed to know Sphene, and even if she was opposed to her goal, they didn't seem to have a "bad relationship", so I don't think she was killed or anything like that.

Least something also caused her to be stuck where she lived. Some time after Krile was picked up.

All we know is that it was during the thirty years inside the bubble, and that she had a regulator on at the time, since her memories were stored in Living Memory. No exact details have been given.

I believe we can rule out old age as the cause of death. Viera are confirmed to live three times as long as Hyur, so let’s say 300 tops. Erenville is confirmed to be 25 years old as of Dawntrail, thanks to the Eorzea Encyclopedia, and Cahciua was one of the warriors that sealed Valigarmanda 80 years ago. Let’s say hypothetically she herself was 25 when they sealed Valigarmanda: she would then be 80 when Erenville was born, 105 when he returned to Tural, and then 135 after the 30 year time skip caused by Alexandria. So barely middle aged for a Viera.

My theory is that given her “adventurous” nature, she may have been out in the wild and ran out of Soul Cells, perishing by creature attack. Upon becoming an Endless and learning about Living Memory, she found a way to control one of the robots in the real world so she could gather a following and try to stop the inhumane practices keeping the Endless “alive”.

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Originally Posted by Xernic

I believe we can rule out old age as the cause of death. Viera are confirmed to live three times as long as Hyur, so let’s say 300 tops. Erenville is confirmed to be 25 years old as of Dawntrail, thanks to the Eorzea Encyclopedia, and Cahciua was one of the warriors that sealed Valigarmanda 80 years ago. Let’s say hypothetically she herself was 25 when they sealed Valigarmanda: she would then be 80 when Erenville was born, 105 when he returned to Tural, and then 135 after the 30 year time skip caused by Alexandria. So barely middle aged for a Viera.

My theory is that given her “adventurous” nature, she may have been out in the wild and ran out of Soul Cells, perishing by creature attack. Upon becoming an Endless and learning about Living Memory, she found a way to control one of the robots in the real world so she could gather a following and try to stop the inhumane practices keeping the Endless “alive”.

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What if part of the reason why she willingly used the regulator despite knowing it would rob her of her memories was because she knew she wouldn't make it out of the dome alive and wanted to leave some version of herself behind for Erenville to find?

My guess is that she got killed by something loyal to Sphene while trying to prevent Interdimensional Fusion. Once she became Endless, the "protect all my robot ghosts" programming kicked in to prevent Sphene from doing anything further to her.

Can old age really be ruled out, though?
We know that the Endless take the form of what they looked like during their happiest moment in life
This is shown through Wuk Lamat's mother figure and the side quests in Living Memory

Given her character, it would make sense then that how she appears before us is when she was most happy - traveling on the road with Gulool Ja Ja and the others.

My reason for thinking this is a comment she made when we first meet her, though admittedly I can't quite remember the full thing. She refered to herself as a young shetona maiden, or something along those lines which seems odd to me but could be nothing

It's tricky with Viera, because of their lifespan and I don't recall us seeing a visibly aged one as they retain their youth for the most part. I believe one thing that what I say would struggle to hold against is Iyaate, the blue-haired woman we meet in the MSQ who seems to be familiar with Erenville and his mother

I do like the idea that she was possibly killed due to her affiliation with the rebel group seeking to shut everything down though, and it's probably a much better explanation story-wise as to why she's no longer around but the other members seem to make no mention of it

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Originally Posted by CVXIV

Can old age really be ruled out, though?

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Depends if Viera undergo menopause or not, and assuming they do, as others have mentioned, Erenville is 25, so Cahciua must've been capable of having children relatively recent in a Viera's long life.

Of course, there are other lore bits about Viera that shows their biology is very unlike that of huma- I mean, hyur, so it's entirely possible they don't, and elderly Viera women are still capable of having children, we can't be certain on that front.

Got the impression that she might have been incapacitated. Seeing how she wanted to travel but couldn't. And her looks in living memory was of when she was travelling with Gulool Ja Ja

Something I find questionable that the story never seem to address is how do Regulators handle body damage, like could a Regulator fix what Raubahn did to Teledji Adeledji?

Like imagine if a beast tore off someone's arm and promptly ate said arm, the person escapes while the beast is busy chewing, but they are bleeding profusely from the mangled stump, and while hiding, they bleed to death, the Regulator kicks in and revives them, is the stump going to be fixed in any way, or will they continue to bleed from the stump, and almost immediately die again? we could assume it can handle wounds so long as all relevant parts are there, even replenish things like blood, but could a Regulator repair Raubahn? could it do anything about Arenvald?

Maybe it's the middle ground between those two options and a regulator wouldn't be able to repair/recreate the arm but (pseudo-)cauterise the stump. So the person survives but has still lost their arm.

Personally, I always found old age to be the least likely cause of her death, since Erenville does not noticeably react upon learning that the inside of the dome has skipped 30 years ahead of us. If she had been old enough to be that close to death, that info alone should have set off alarm bells. But considering how forgetful the writing of Dawntrail is with many, many details, to the point of some characters outright forgetting and changing their motivations midway through MSQ, maybe the writers just forgot that he should have been concerned, and it might have been old age after all.

As for a bodily damage and regulators, in the final boss of The Vanguard and such they seem to at least heal internal damage just fine. Whether there is a limit to it is unclear, but considering overcharging on souls can cause outright physical transformations, I'd guess regrowing a limb might not be much of a problem. The big question mark is decapitation, since that could counts a removing the regulator from the body.

We saw in EW with sufficient soul energy, you can literally raise the dead and travel in time. Soul energy is potent stuff so healing massive trauma would be easy as long as the regulator is intact.

wow there sure are some neat and interesting ideas here. It'd really be a shame if the writing team didn't make such an interesting topic a focus of the MSQ. I'm glad they were smart and didn't do that though. It would really suck if they focused on another character instead of Erenville and his Mom.