Mike... lol. He's fine now. He went back to Earth and is effectively retired, he does some grueling outdoorsy stuff like long-distance hiking as much as possible, and gives talks here and there out of boredom. He has a failed therapy dog named Levi II who was too excitable to pass training, but in a way that is a good fit. He isn't in terribly strong contact with Bex, but will send her annoying insect memes to get on her nerves when he has nothing better to do, which is often.
You might notice he lost his leg as well... thighfriend is being held in some facility somewhere I'm sure. I know it's technically canon but in my headcanon thighfriend has no upper limit to growth and is currently like 20 ft tall in a tank under a desert in Colorado lol. Good for him.
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Bex's End page here: https://www.patreon.com/posts/31948832
Threvi's End page here: https://www.patreon.com/posts/32071889