#eclipse x reader?

So, I've been thinking about a subnautica Au. And I know there are a few like that, but I've noticed that all the ones I've seen have been about the reader falling into B4546 after the Aurora crashed and taking many factors out of the game. So I want to take the Below Zero DLC as a base and slide to the end of the first game.

The reader steals a ship, and is basically a fugitive from the law and might not be able to have a normal life on earth because of it, but they doesn't care and goes to B4546 to find out what happened to his research team. Basically the reader studied all his life and investigated from earth that planet along with other humans that were on that alien planet, but suddenly they gets kicked out of his job and the whole investigation is closed, throwing all their life away as if it was nothing. For a few years they go from one lab to another but find nothing that interests them, only thinking about why the research was shut down. So they ignore Alterra's warnings and go off to investigate.

What happened was simple, a couple of sibling specimens were captured, and the older brother went to rescue them, tearing down all the foundations and the few who escaped were contaminated with the toxin of that leviathan and other substances that were in the lab, creating a deadly disease not only in B4546, but also on earth that was brought by the few members who returned.

Then, the reader arrives and meets Sun and Moon, when they finds the laboratories are contaminated with a disease and neither Sun or Moon knows what is going on other than that their human is sick. The Leviathan are immune thanks to an antibody, but they are too young to expel it and heal the reader. And that's where Eclipse comes in, who doesn't trust the reader but tolerates him because his siblings are fond of him. The older leviathan at a certain point will give the reader the cure, but he has to help him find a way to distribute the cure to his dying planet.

I'm thinking of adding an AI, maybe Gramrock freddy, who will be connected to the reader's brain in a similar way to how Al-An connects to Robin, but instead of an alien it's an AI left behind by his fellow researchers at one of their facilities. And eventually he will get a robotic body and help the reader find a cure along the way.

Needless to say, the reader stays with the boys, in deep areas where Alterra will never find them. They meets Vanessa, who plays the role of Marguerit. Eventually she will become like a sister to the reader, but at first she will be unwelcome.