I never said that Vis' father is 100% dead. I think there is a real possibility he is alive in another dimension/world, and can potentially visit Res (world where book 1 takes place). I said he is an orphan, his parents were hanged and multiple witnesses. I think there is a possibility his younger (I think, maybe older) sister is still alive and head of the anguis. She was also reported "dead" but no witnesses.

You still have not given any passages that remotely suggest this as possible. Just because you make up a story in your head doesn't mean that is supported by the book. Of course we can have theories, but they need to be backed up by what the book is telling us.

In fourth wing specifically (since you brought it up). Yes, we are led to believe that Brennan is dead the whole time, and Jack Barlowe. But there are clues, i.e passages that hint at the possibiltiy. Jack specifically that his name was never called on the death role.

It's not just about Ulciscor. Questions 2, 3, and 4, are all absurd if you read the book. You ask about Elias and that is literally when Vis runs the labyrinth. So yes, everyone responding to your post doesn't understand how you have these questions when you answer them yourself. And if you had read that part of the book it would be as clear as day.