Relationship

Kraken Isaac

Isaac, like Hyoga, was also an orphan under the guidance of Aquarius Camus (the Crystal Saint in the anime), who received training in order to become Saint. As Hyoga he was devoted to Camus and followed his training even with the arsh Siberia's weather. However after the accident he had he choice to live under the sea with Poseidon, his savior, and voted it faith to him. After that Isaac consider all the other humans like powerless creature and underclassed his master (Camus and also the Crystal Saint) saying that they are weak.

However his tecnique, the Aurora Borealis is almost another version of the Aquarius Camus' Aurora Execution, but somewhat weaker.

Cygnus Hyoga

As mentionated in the past section, Hyoga was trained by Camus in Siberia. He had a great respect for his master also because he was almost like a father. And well Camus doesn't act very different from Hyoga's aspectative in fact he is very father like with him. He scold always Hyoga for his attackment with his mother the block him to improve and became stronger. In fact for Camus the attackment of Hyoga for his mother is his weak point and for this reason he makes the ship where Hyoga's mother belong dip down in the sea.

It's only thank to this act of Camus that his pupil reach the 7th sense necessary to reach and defeat the Gold Saints. In that moment his heart was full of hate for Camus and hate that contrasted the admiration and love he had proved for the Aquarius saint. However the hate obfuscated his eyes and he was defeated and reclosed in the Ice Coffin by Camus.

When Shiryuu melted the ice where he was reclosed, his next opponet (Milo) tries to show a cealed truth to Hyoga, something that the next battle could reveal: Camus feelings.

Once Hyoga reached his master temple, the dialogue became hot immediately. Camus seem heartless and sad to see his pupil again and show this sadness saying that behin free from the ice is a mistake.
Hyoga wasn't enought for him, to strong. The strenght of Camus attack destroy Hyoga's armour. However he don't give up and awakening the 7th sense he defeat his master reaching the absolute zero, something that not even Camus himself was able to do. however even reaching it Camus was owever sure of can't be defeated since all Hyoga's tecnique weren't enought. And here there is the surprise: Hyoga is able to do the Aurora Execution and it's able of use it better then the Aquarius Saint himself. This is a great shock for Camus but also a pleasent surprise. He was very proud that the pupil could handle his last tecnique and overpass him reaching the absolute zero and was able of this because he beleaved in Athena and his friends. In that moment Camus reveal is true wish of master, the one to make Hyoga continue his path as Athena's Saint, but his freezed body won't allow it and the death reach him. The Aquarius Saint fall death and near him his pupil cries true tears of pain for him. Only in that moment Hyoga get that his master was only trying to make him reach the 7th sense and overpass him.

Scorpio Milo

It's not very clear the relation between Milo and Camus but it's known that they're friends and one of the few that Camus can count. During the battle between him and Hyoga, Milo asked a lot of times if he understood Camus' feelings and thoughts for him. This is a proof of how much the Scorpio Saint cares of his friend.

The shock seeing the death friend in Hades was a lot for Milo, but this didn't stopped him to continue his purpose and fought him, Saga and Shura with the help of Mu and Aiolia using the Athena Exclamation against their past comrades.

The confirmation of their friendship came from Saint Seiya G and the Hades saga. I assume that this came out because Kurumada originally thought of Milo as Hyoga's master, but then he changed idea and Aquarius became his master.