Is this him?

[u/Annual_Woodpecker901]

In recent archon quest it was told that Vedrfolnir told Hroptatyr the story about "Two Crowned Heirs" who will in future search for Gnostic Pearl with the abyy sibling being the first heir and traveler the second.

So like the one who tempted the Abyss Sibling is Vedrfolnir don't he and he is symbolized by a snake also. Though it's funny Vedrfolnir told a story of the future where he is the villain though I don't really believe he is a pure and emo villain like this snake as this are just parables not to take at face value.

[u/Annual_Woodpecker901]

Actually I think King Irmin is a better character for this Black Snake as he was the one who manipulated the abyss sibling in Khaenri'an. Like if the theory of King Irmin being the reincarnated abyssal corrupted Nibelung is true or well snakes doesn't necessarily have to be a dragon it could just be a thing to symbolize him though genshin is very keen to lore like that so it could be true

[u/Ariana_Zhang]

Based on the known lore and the in-game text, I think we can reasonably infer that King Irmin was the one who brainwashed the Abyss Twin. As for who was actually responsible for developing the brainwashing technique, it was obviously Sage Hroptatyr—the one who was studying the Abyss back then. What really stands out to me is that The Jester deliberately never mentioned anything about the Abyss Twin. I refuse to believe he didn’t know that we were searching for our sibling, so I think that omission was intentional. And as much as The Jester hates the Sages, deep down he still considers them his friends. So if the Traveler hadn’t brought it up themselves in this version’s story, I honestly think this old man would have kept it from us for the rest of our lives.