"Did he have powers that would have let him survive that?"

"Many empowered could survive being swallowed by such a demon for at least a brief period of time, I expect. We tend to be very hardy."

"Dang. If I am swallowed by a lava demon don't bother, I'm not immune to extreme temperatures."

"Oh, I would have guessed that your ability to phase through objects would make you immune to physical harm as a general rule, is that not the case?"

"I still have to breathe, and I still experience ambient temperature."

Nod.

"Noted."

"What's the next one?"

A demon made out of metallic vegetation that could mutate living things into traps that incorporated a variety of poisons, most of them both painful and hallucinogenic in nature.

Spooky.

Especially spooky considering it can turn people into traps just like anything else alive.

"Were they distinguishable as having been thus transformed?"

"If I'm interpreting this line correctly, they weren't?" She can read that bit again.

"How long were people going around being secretly poison traps?"

"I believe there are instances of such traps being sprung years later mentioned in the records."

"Eugh."

"Quite."

"This was how long ago?"

"Nearly three centuries."

"So one may hope the remnants are all gone now."

"Most likely, yes."

"What else've we got?"

Lucette can skim through the book and summarize each demon.

A demon made of needles that extracted images from victims' minds and fashioned them into lesser monsters, which it released to fight against the empowered.

A demon which resulted in 32 empowered 'retiring' and the extermination of an unnamed town. No further details are recorded about that campaign, and there's a royal order to execute anyone found with any written records of what occurred.

And lastly, to round out the first volume, a demon with three humanoid bodies, one of stone, one of fire, and one of quick silver. They appeared separate and were initially assumed to be three different wild demons until it was discovered that each could transfer wounds to another (stone to fire, fire to quicksilver, and quicksilver to stone). 

Haru has comments on all of these as they are read out to him whether they need the comments or not. He gets, very gradually, quieter, as they sit up holding hands.

Lucette appreciates his comments, even the unnecessary ones.

Eventually: "I think I'm at a low enough backlash level that I could go to bed by myself without it being awful. It might make sense to sleep now and finish this up over breakfast."