The Shelter... so curious

[MarcusStuhr]

It seems like Episode Two will revolve around whatever's going on in the Shelter, or at least at first. I wanted to bring up this passage from the Rockworm Studies:


"To that end, seems I’ve had a pretty lucky stumbling here. All this old
research is about something similar to what’s been hunting me ever since
I escaped the shelter four days ago. Don’t get me wrong, after what...
after what they did to me back there, I’d rather be facing anything else,
and after almost a year of fighting for our lives, we didn’t really stand
a chance anyway. I don’t know how many are left inside"

What do you all think happened to him in the Shelter?

Also, the Shelter note indicates:

"Chief Overseer – Wilbur Frisk (’80 – present)"

One of the few apparently still alive in the Shelter operations? Do you think he was the shaded character at the end of the game? Or perhaps the actually-not-dead Red?