"On that day all the gods looked down from heaven upon the ship and the might of the heroes, half-divine, the bravest of men then sailing the sea," he quotes back. That's surely not going to piss Natsuno off more.

But, at least Number 6 is thoroughly impressed enough to move aside and stop gatekeeping the books on this shelf.

"Far be it from me to deprive a youth of his education. This subject happens to be a pet interest of mine, in case you desire some tutoring."