Except that assertion is defied by the series itself. We have a set time period for when Yhwach was born - 1,200 years before the start of the main series. The Quincy had existed long before then; long enough that there were folktales of Quincy born unable to collect reishi (who, in truth, could share power with others like Haschwalth) at the very least.
Because of that, Yhwach can't be the literal "First Quincy". The reason why his "blood" flows in the veins of all modern Quincy is that the only Quincy who survived to the modern-day were descendants of his army and the Stern Ritter. The rest were exterminated by the Shinigami 1,000 years prior to the start of the story.
Yet here you are, considering your own assertions to be the one definitive truth instead of what they really are: interpretations and your own head-canon.
As has been brought up before, abilities in Bleach are inherently personified and unique to each individual. Every Zanpakuto name and ability is unique to their Shinigami; every Hollow's appearance, mask and abilities, and every Arrancar's abilities are unique to themselves as well.
The same goes for Fullbringer abilities: each one was shaped by the Fullbringer's personality, experiences, desires and, in most cases, their attachment to the item they channel their power through. Your argument would have to explain how each Soul King fragment, with its specific ability, "just happened" to end up inside a Human that "just happened" to developed desires or beliefs later in life that "just happened" to reflect the "ability" contained in the Soul King fragment.
When Aura Michibane proves that isn't the case. She doesn't have a specific Fullbring ability of her own, despite having the Saketsu of the Soul King. What she has is immense power, allowing her to use the Fullbring ability to "manipulate the souls of matter" to an extreme extent.
The Sternritter are no exception. Royd and Loyd were implied to have some version of "The Yourself" since they were young; Uryu's immunity to the Auswhalen was directly tied to his inherent potential, to possessing something surpassing Yhwach's power. That something turned out to be "The Antithesis". It is also clear each regular Sternritter possessed abilities reflecting some aspect of themselves, whether it be personality or beliefs.
As for my comparing the Soul King fragments to the Hogyoku:
------------------------------------------------------------------
“That’s not what I mean. Do you know how Fullbringers are born?”
“I think I can guess. A fragment of the Rei-o, am I right?”
Why is the Fullbringer targeted by the Hollow at the foetal stage?
Ginjo had predicted that the reason had to be because of something that was mixed into the Konpaku from before it was born. Although it was not clear what kind of influence this fragment of the Rei-o would have; Ginjo had assumed that just like Mimihagi-sama had taken possession of a Shinigami; if this fragment were to be fused with human beings, then it would bring about an effect similar to that of the Hogyoku.
A device that manifests the desires of those around it; something that could change the world.
The Hogyoku.
It would not be surprising if the fragment of the Rei-o acts as its substitute and activates Fullbring that can turn attachment into an ability.
------------------------------------------------------------
I know it is a fan translation, but I expect the official translation to say something quite similar, and the original Japanese as well. Ginjo, the man who knows the most about how Fullbring works, believes that the Soul King fragments work similarly to the Hogyoku, acting as a catalyst to allow a Human to awaken their Fullbring abilities through attachment and desire.
In other words, they aren't the source of the ability; they're the catalyst to awaken the ability.
Except that assertion is defied by the series itself. We have a set time period for when Yhwach was born - 1,200 years before the start of the main series. The Quincy had existed long before then; long enough that there were folktales of Quincy born unable to collect reishi (who, in truth, could share power with others like Haschwalth) at the very least.
The folk lore is contradicted by several things, such as the statement I posted above, Yhwach even being referred to as the progenitor in the manga and Yhwach being referred to as the Father of the Quincy, there's also Isshin Kurosaki directly saying Yhwach was the first.
Also, if you want to be
technical, Yhwach wasn't the first, since Pernida strictly identifies as a Quincy and has existed for around a million years, but Pernida had nothing to do with the Quincy as a species, whereas Yhwach is directly said to have started it, so he may not be the "first"
literally, but he definitely was the progenitor of the Quincy as a species.
Because of that, Yhwach can't be the literal "First Quincy". The reason why his "blood" flows in the veins of all modern Quincy is that the only Quincy who survived to the modern-day were descendants of his army and the Stern Ritter. The rest were exterminated by the Shinigami 1,000 years prior to the start of the story.
Evidence? This just seems like conjecture to me.
Whenever Yhwach is stated to be the progenitor of the Quincy (2 or 3 times split between the manga and novel) or their father, it's
the Quincy, not some specific group or branch, but the Quincy
as a species in general, even in the quote it literally says the progenitor of their species....
Regardless, looking at it objectively, it's
possible the whole thing regarding Yhwach being the first or not is just an inconsistency, since there's evidence both ways.
As has been brought up before, abilities in Bleach are inherently personified and unique to each individual. Every Zanpakuto name and ability is unique to their Shinigami; every Hollow's appearance, mask and abilities, and every Arrancar's abilities are unique to themselves as well.
The same goes for Fullbringer abilities: each one was shaped by the Fullbringer's personality, experiences, desires and, in most cases, their attachment to the item they channel their power through. Your argument would have to explain how each Soul King fragment, with its specific ability, "just happened" to end up inside a Human that "just happened" to developed desires or beliefs later in life that "just happened" to reflect the "ability" contained in the Soul King fragment.
When Aura Michibane proves that isn't the case. She doesn't have a specific Fullbring ability of her own, despite having the Saketsu of the Soul King. What she has is immense power, allowing her to use the Fullbring ability to "manipulate the souls of matter" to an extreme extent.
Your Fullbringer argument is just a waste of time and I don't really care to read through it, it has almost nothing to do with my original argument and I only brought up Fullbringers in m original post as another interpretation incase you want to ignore a blatantly clear statement.
The Sternritter are no exception. Royd and Loyd were implied to have some version of "The Yourself" since they were young; Uryu's immunity to the Auswhalen was directly tied to his inherent potential, to possessing something surpassing Yhwach's power. That something turned out to be "The Antithesis". It is also clear each regular Sternritter possessed abilities reflecting some aspect of themselves, whether it be personality or beliefs.
Royd and Lloyd are contradictory, they're both said to have possessed it since birth and then afterwards it's stated that only Gerard and Pernida had their powers originally and weren't granted them by Yhwach.
Uryu's immunity is never elaborated on, nowhere is it said to be because of his inherent potential lol. Saying his immunity to Auswahlen is due to The Antithesis is pure headcanon, never stated and is only theorized.
SK is literally stated to be the source of their abilities, it doesn't matter what weak headcanon riddled argument you make to try and refute that, unless you give me another statement contradicting SK having them, we're not going to get anywhere.
As for my comparing the Soul King fragments to the Hogyoku:
------------------------------------------------------------------
“That’s not what I mean. Do you know how Fullbringers are born?”
“I think I can guess. A fragment of the Rei-o, am I right?”
Why is the Fullbringer targeted by the Hollow at the foetal stage?
Ginjo had predicted that the reason had to be because of something that was mixed into the Konpaku from before it was born. Although it was not clear what kind of influence this fragment of the Rei-o would have; Ginjo had assumed that just like Mimihagi-sama had taken possession of a Shinigami; if this fragment were to be fused with human beings, then it would bring about an effect similar to that of the Hogyoku.
A device that manifests the desires of those around it; something that could change the world.
The Hogyoku.
It would not be surprising if the fragment of the Rei-o acts as its substitute and activates Fullbring that can turn attachment into an ability.
More irrelevant drivel that doesn't actually refute my core argument, that being SK having the Schrifts, me bringing up Fullbringers was again, just another interpretation if you ignore a blatant statement, but yet you're almost constructing your entire post solely around that.
Regardless, I feel like this quote alone debunks your argument
"It was a Quincy as well as a Shinigami; also a human. A symbol of hope governing the chaotic world with innumerable abilities like that of Fullbringers."
SK is clearly stated to not only have
innumerable abilities, but also the Fullbringers abilities themselves.
Lastly, since it's currently accepted for him to have the Fullbringers abilities,
I'll link you the thread where your downgrade was rejected,
and the original thread where it was accepted, since your arguments are literally brought up in that thread word for word (little suspicious) and debunked.
In other words, they aren't the source of the ability; they're the catalyst to awaken the ability.
Wrong, this was refuted both in
your downgrade thread and the original thread that had SK having Fullbringer abilities accepted, thankfully people already debunked your argument in the past so I can just link the thread and not waste my time telling you something you already know but refuse to accept.