In the other topic Moïra started a stimulating discussion about the Hyoga’s master. Without expanding the off-topic there, I decided to continue here.
There are two important interviews, I think little known here.
When Crystal Saint was released as myth cloth premium, there was a reportage on the magazine Figure Oh #109. Kozo Morishita explains the genesis of this filler saint.
A complete translation in Portoguese:
http://taizen-saintseiya.com/figure-oh-o-cavaleiro-de-cristal/We learn when the first episode of the anime was broadcast, the production of the scripts had already reached the whole plot developed by Kurumada in manga (battle with Ikki).
In the script of ep 15 it has been determined the development of original characters, to expand the relationships: Docrates, Cassios’ brother.
Hyoga’s master was introduced in ep 17.
So these filler characters, sonota saint, were conceptualized when the silver saint didn't exist yet!
They are the result of a huge misunderstanding on the part of the producers of the anime.
Their early impression of Kurumada's story was that the constellation saints were attributable to Saori Kido (ten bronze saint and the golden cloth)
Whereas the enemies from the Sanctuary were something different.
They weren’t saint of constellation.
Therefore the fact that Docrates & Co didn’t present themselves with the name of a constellation was not something agreed with Kurumada, to avoid duplication with saint that he wanted to introduce later, likely.
We’d say that there was really NO interchange with kurumada at this stage.
As ridiculous as it may sound us, Arles wasn’t supposed to have any Perseus saint, or Taurus, under his orders.
He has other kind of saints….. (sonota)
So Crystal was the true first master of Hyoga.
Was Scorpio saint, from WSJ prepubblication, his second master? The user Moïra was also speculating if Milo was supposed to be Hyoga’s master since his debut with Aioria at the Pope's audience.
The answer is no. Masami planned something different.
We know from another interview he gave for a Japanese magazine “Pafu”.
It was published on 13th April 1987, just a couple of day before in Jump was published the infamous chapter with Scorpio sinking the boat of Hyoga’s mother in Syberia.
But you have to take in account the interview was recorded before.
It has to be after 24th February anyway, because the interviewer make a reference to SHAKA gaiden. It was pubblished along with regular chapter where Aioria confronts the Pope and Virgo gets in the way.
Spanish translation here:
https://www.ssnextdimension.com/entrevistas/pafu-1987/Kurumada states that he would like to write more gaiden about the protagonists, like Hyoga and his master he annihilated "
qu'il a anéanti ..."
Hyoga’s master was already dead!
As much incredible as it may sound, this revelation perfectly aligns with the incipit of the manga.
We don’t see his teacher nowhere in Siberia. Hyoga claims to be already a saint, but he needs the letter from the Santuary to retrieve his cloth.
Imho it look much like Ikki’s backstory, he killed Guilty to become saint.
Maybe the repetitiveness could have made Kurumada change his mind about the fate of the Hyoga’s master.
But it must be taken into account too in that time span (march ‘87) the episodes 20 and 21 aired in TV, Hyoga fights Crystal Saint.
As we ‘d agree Kurumada took inspiration from that episode for Pope’s genromaoken to resolve the stall beetween Aioria and Shaka, then he’s moved from his idea of a dead master.
It’s more emotional if it takes place in the present.
In case there're still doubts, I suggest you read another question from this interview in which Masami denies any interference by him in the anime adaptation, so far.
Hope this have clarified , Moïra.