"Do you find it objectionable or just silly like the owls?"

"Silly but in a more juvenile way."

"I have no idea why it's called that beyond 'the founders named it'."

"They had weird taste in names, then."

"It was around a thousand years ago, maybe tastes in names changed between then and now like between now and 2179."

"Hog. Warts."

"You call yourself a demon and the place you're from Hell!"

"It's called that in English because of some mythological overlap! In demon languages it's called other stuff better translated as 'maker' and 'emptiness'!"

"Well, Hogwarts is Hogwarts and no one has time travel good enough to go ask the founders why."

"Yeah, I noticed the limited state of the art on time travel."

"Promising as a field of research but - probably never going to be able to reach back years, not without significant risk of disaster."

"Disaster, oh no." Sigh.

"...do you have preferences about what I tell people who I have running errands -"

"I would consider it unreasonable to ask anyone to keep the obvious thing secret."

"If I need to get permission from the board of governors to allocate this wing of Hogwarts to time travel magic and so on, and I probably do, some people will be impressed with you."

"...the upshot being?"

"Even if you'd consider it inappropriate to have preferences about what people know, you might still consider yourself entitled to have preferences about whether people come try coaxing you into killing their enemies for them or just striking up enough acquaintance that the threat is implicitly present."

"I would not like to be coaxed into killing people, I find I have no taste for it at all."

"I noticed. So I might neglect to mention things to people who are likely to be stupid, if that's all right."

"Thanks."

"And until we know whether mind-controlling magic works on you."

"Yeah. What's the safe testing-it-out range of spells look like?"

"Cheering charm? Though part of the problem here is that even if you're immune to most things, the scariest stuff is also the stuff it's rarest to be able to counter - even if you shrug off everything we try I wouldn't give it better than 50-50 that the Imperius doesn't affect you - was that in the notes -"

"I mean, if it's an extension of my indestructibility it might work the other way around, I am just as vulnerable to a pinprick as you are but I just stay only yea vulnerable even if the pin is applied with more force, but point taken - if it was in what I got I haven't found it yet."

"There're three spells called the Unforgivables, because attempted use against a human or the other species we are lately acknowledging as people is an automatic life sentence in Azkaban. One does mind control, one does torture, one is instantly lethal. Why they're a bigger deal, by law, than other ways of achieving the same effect - love potions aren't even illegal - is mostly historical reasons, but it's also claimed they're impossible to cast without malicious intent - you couldn't use the Killing Curse to help someone in pain pass quickly - 

- it is not an area with any published research, so I am not especially equipped to guess if that's right."