human
Subaru:  Sound and color and everything else were blown away. "...Ohhhhh..." When the light cleared, they were standing in a space hewn from stone—in the middle of the tower, surrounded by massive walls of books.
gpt
Narration:  The white space surrounding them disappeared and was replaced by countless shelves of books extending all the way to the ceiling. Confirming that the monolith he touched had disappeared, too, Subaru was reassured that his answer had been correct.
human
Emilia:  "You did it! You’re amazing, Sub—"
gpt
Subaru:  "Whoever thought this up is the worst!"
human
Emilia:  "Huh?! That’s your first reaction?!" Seeing that the third floor, Taygeta, had been unlocked, Emilia’s cheers turned to shock at Subaru’s reaction.
gpt
Subaru:  His face was puckered into a frown as his complaint echoed. "Getting the answer right is definitely an achievement, if I do say so myself, but the solution is a huge freaking problem. This wasn’t fair at all."
human
Emilia:  "R-really? I just think it’s great that you know so much."
gpt
Subaru:  "The issue isn’t about how much I know, but that anyone who wasn’t like me would never be able to solve it. That’s the problem." Subaru scratched his head.
human
Emilia:  Emilia just looked confused.
gpt
Subaru:  He tried to think of how to explain it, but getting into the details would be a bit dangerous, too. "Your master has a really nasty personality from the looks of it."
human
Emilia:  "Whoa, whoa, whoa, what are you saying? It’s not like you to dunk on yourself! Can’t really argue with the nasty bit, but at least there’s some compassion in it being solvable! Reid would definitely give an impossible problem…like leave a clone of himself and not let anyone through who couldn’t beat him."
gpt
Subaru:  "That’s a scary thought, too, but I’m not sure which is actually more difficult to solve."
human
Narration:  Either way, it was looking a lot like the heroes who defeated the Witch of Envy in the past all had personality issues. Considering that, it might actually be better if knowledge of a different universe was the only thing being tested.
gpt
Anastasia:  "Still, though, there sure are a lot of books here." Ignoring their little post-test review, Anastasia examined the bookshelves surrounding them.