Very observant point…and there are some other interesting points about how the abyss works that Talarius will find out about in Book II.
Humans do come to the Abyss, and they can be tortured there for centuries, and they can suffer…and you are correct there is not much for human food or water and this is often used as part of the torture….
His reaction to the upcoming events will be to say the least…complex and probably mercurial. It’s going to be a wild ride for the guy.