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[Silchas Ruin] 'Let us hope it doesn't come to that. Let us hope the soul within you does not entirely awaken.'
[Kettle] 'It won't. That's why none of this matters.'
'What makes you so certain, Kettle?'
'The tower told me.'
'It did? What did it say to you? Try to recall its exact words.'
'It never spoke with words. It just showed me things. My body, all wrapped up. People were crying. But I could see through the gauze. I'd woken up. I was seeing everything with two sets of eyes. It was very strange. One set behind the wrappings, the other standing nearby.'
[Kettle] 'It won't. That's why none of this matters.'
'What makes you so certain, Kettle?'
'The tower told me.'
'It did? What did it say to you? Try to recall its exact words.'
'It never spoke with words. It just showed me things. My body, all wrapped up. People were crying. But I could see through the gauze. I'd woken up. I was seeing everything with two sets of eyes. It was very strange. One set behind the wrappings, the other standing nearby.'
So, two bodies. One of them the body of a child who just died, of Letherii descent, thus white-skinned [likely] and nothing special at first galnce. This body becomes the vessel for what will become Kettle.
My theory is based upon some subsentences and that it's entirely possible, that the other soul/person, though born in 7C and raised by the Nameless Ones, isn't described physically. To be precise, there's only one physical trait mentioned..
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'What else did the Azath show you?'
'Those eyes from the outside. There were five others. We were just standing in the street, watching the family carrying the body. My body. Six of us. We'd walked a long way, because of the dreams. We'd been in the city for weeks, waiting for the Azath to choose someone. But I wasn't the same as the five others, though we were here for the same reason, and we'd travelled together. They were Nerek witches, and they'd prepared me. The me on the outside, not the me all wrapped up.'
'The you on the outside, Kettle, were you a child?'
'Oh no. I was tall. Not as tall as you. And I had to wear my hood up, so no one could see how different I was. I'd come from very far away. I'd walked, when I was young, hot sands – the sands that covered the First Empire. Whatever that is.'
'Those eyes from the outside. There were five others. We were just standing in the street, watching the family carrying the body. My body. Six of us. We'd walked a long way, because of the dreams. We'd been in the city for weeks, waiting for the Azath to choose someone. But I wasn't the same as the five others, though we were here for the same reason, and we'd travelled together. They were Nerek witches, and they'd prepared me. The me on the outside, not the me all wrapped up.'
'The you on the outside, Kettle, were you a child?'
'Oh no. I was tall. Not as tall as you. And I had to wear my hood up, so no one could see how different I was. I'd come from very far away. I'd walked, when I was young, hot sands – the sands that covered the First Empire. Whatever that is.'
So, tall, not as tall as Silchas [Edur aren't as tall as Andii], but taller than a human, because if she wasn't then she woudn't mention it. I also can't recall the people of 7C being excentionally tall, unless I confuse facts again. Assuming she is half-Edur and half-Eres, her height may be shortened by the Eres half, but it's likely to still be above average.
Grated, the hood she's got to wear may be atrributed to being a 7C native and thus dark-skinned, but I doubt it. Depending on where from 7C she might be, her skin may have looked just very tanned, which would also apply to the Nerek witches accopanying her, so she wouldn't have to hide. So I conclude she's got to look even more different, you know maybe with greyish skin?
Plus, that the person in question, who will leave her body behind - since I guess that's what she's been prepared for by the witches - is the Eres'al's daughter is first mentioned further down the text and second the Nerek care for her and accompany her. I doubt they have travelled with her ever since 7C/First Empire, rather it's likely they took charge of everything when she arrived on Lether. She says 'I'd walked, when I was young, hot sands', meaning she likely didn't walk these sands recently, the person standing there is a grown up, not a child. So there probably was a long journey.
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'What did the Nerek witches call you? Had you a name?'
'No.'
'A title?'
She shrugged. 'I'd forgotten all this. They called me the nameless one. Is this important?'
'I think it is, Kettle. […]'
'It was a title. They said I'd been prepared from birth. That I was a true child of Eres. And that I was the answer to the Seventh Closure, because I had the blood of kin. „The blood of kin“. What did they mean by that?'
'No.'
'A title?'
She shrugged. 'I'd forgotten all this. They called me the nameless one. Is this important?'
'I think it is, Kettle. […]'
'It was a title. They said I'd been prepared from birth. That I was a true child of Eres. And that I was the answer to the Seventh Closure, because I had the blood of kin. „The blood of kin“. What did they mean by that?'
There, 'a true child of Eres'. The Nerek should know, they worship the Eres'al and likely the witches were powerful enough to at least sense the nameless person's kinship to their goddess.
Then, 'the answer to the Seventh Closure'. Somewhere else the Edur are said to be the answer to the Seventh Closure, the rising of a new empire, blah. And the person in question has got 'the blood of kin'. I think you could interprete 'the blood of kin' as being the blood of those who perform the Seventh Close.
And as to the Nameless Ones.. that the future Kettle grew up on 7C among the NO doesn't mean she's a native, it just means she grew up there.
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'I guess this Eres was my real mother.'
'Yes.'
'And soon you will know who my father is.'
'I will know his blood, yes. At the very least.'
'I wonder if he's still alive.'
'Knowing how Eres plays the game, lass, he might not even be your father yet. She wanders time, Kettle, in a manner no-one else can even understand, much less emulate. And this is very much her world. She is the fire that never dies.' He paused, then said, 'She will choose – or has chosen – with great deliberation. Your father was, is, or will be someone of great importance.'
'So how many souls are in me?'
'Two, sharing the flesh and bone of a child corpse. Lass, we shall have to find a way to get you out of that body eventually.'
'Why?'
'Because you deserve something better.'
'Yes.'
'And soon you will know who my father is.'
'I will know his blood, yes. At the very least.'
'I wonder if he's still alive.'
'Knowing how Eres plays the game, lass, he might not even be your father yet. She wanders time, Kettle, in a manner no-one else can even understand, much less emulate. And this is very much her world. She is the fire that never dies.' He paused, then said, 'She will choose – or has chosen – with great deliberation. Your father was, is, or will be someone of great importance.'
'So how many souls are in me?'
'Two, sharing the flesh and bone of a child corpse. Lass, we shall have to find a way to get you out of that body eventually.'
'Why?'
'Because you deserve something better.'
Well, this quote is so obvious, it might as well be misleading. I doubt it, though. I think it's [in the story] a coincidence Silchas talks about possibilities, one of which actually happens.
I'd reconstruct Kettle's biography as following:
During HoC the Eres has got a tête-à-tête with Trull. Since she doesn't care about time and seems to be strangely bound to 7C -
Spoiler
[tBH] - , she gives birth there somewhen during the time of the First Empire. Either she gives the child to the Nameless Ones or they sense it somehow, the child ends up in their care. Though I think it's the first possibility, because she's supposed to be the 'answer to the Seventh Closure', during which the Azath tower dies - and as we know from RG
Spoiler
- , and as we also know the Nameless Ones are quite close to the Azath houses in general/worship it. Thus, the child ends up in their care, grows up in 7C and is sent on a long journey, though she still arrives on Lether as an adult. Where the Eres has either told/shown the Nerek witches what to do or the witches sensed it somehow [they had dreams]; the result is the same. The Azath will soon choose a new guardian, which so happens to be a young girl that dies and is 'brought back to life' most likely by the tower itself [I doubt the NO or the witches were involved, since it says 'We'd been in the city for weeks, waiting for the Azath to choose someone', while on the other hand Silchas suspects in the dialogue with Kettle, that someone might have been manipulating the Azath tower, someone capable of communicating with it; but since they had to wait for weeks it can't have been the witches, leaving the NO or the Eres, and still leaving the possibility that the tower chose of 'free will']. Now, there had been a soul within the now undead body, but the NO and assisting Nerek witches [and thus the Eres?] needed the prepared person to be the guardian, thus a ritual had to be performed to tranfer the nameless person's soul into the body of the undead girl, thus creating a body containing two souls; that of the former child and that of the Eres's daughter, who most likely imo was/is also Trull's daughter. So she doesn't really have the 'blood of kin', it's more of the soul's kinship than the body's.As to the soul of the FA, it was inside the body of the dead girl, according to my theory - on whichever way it got there, I'm at a loss. But later in this same dialogue Silchas says 'You have no idea, Kettle, of the extremity the Azath tower found itself in. To have chosen a soul such as yours... it was like reaching into the heart of the enemy camp.' The Azath tower chose its guardian which at the point of being chosen didn't contain the second soul, that of the Eres's daughter, thus knowing it may be a great risk - even though the FA part of the soul was sleeping. And maybe it chose BECAUSE the chances of reviving the guardian were bigger with the body containing something potentially that powerful.
And as to the fact that Kettle remembers seeing through two pairs of eyes, I attribute that to her having two souls and such having access to two sets of memories, which string together in her mind.
As far as I'm concerned, problem solved
That is, unless I'll get ripped apart for bringing up that theory again 
I apologize for possibly bad english.
