You manage to keep your composure as you formulate an answer. "Please elaborate on what this 'exchange' would entail," you ask the alien as you berate yourself for not listening more closely. "Why would it be beneficial for me?"
Kyubey remains impassive as it seats atop your Compendium, and you fail to perceive a significant change in tone as it speaks.
"Our reasoning should be evident," it says. "There are few things we lack access to. While you may not have a current need for a miracle, there is no reason why we can't have a simple exchange of information. You will be appropriately compensated in accordance with the value of the data provided."
Your eyes narrow slightly. "Who gets to decide their worth?"
"We do, of course." It admits without any difficulty. "All knowledge has an inherent value, one we will measure against the cost of your demands. Have you decided what you desire in return?"
Its question catches you off guard, and you lean back on the bench as you furiously think. You come up empty. "...Nothing comes to mind, at the moment." You say slowly. "All the same, compensation can be discussed afterwards."
Kyubey nods. "Agreed."
You look around your little corner of the park as you belatedly realize how out of place you currently are, but you fail to notice any humans paying particularly close attention to your conversation.
"Now then, the first question," it begins without much preamble. "Are you a unique existence? Was your birth artificial, or was it a natural occurrence in this 'collective unconscious'?"
You frown minutely at the very personal question the alien started with. Drumming your fingers atop your seat, you decide to be truthful for now. "The circumstances previous to my birth are unknown to me, unfortunately. As for its nature…" You trail off for a brief moment. "My master never mentioned anything of the sort."
More like he never had a reason to do so. You had never questioned your existence before the events of the incident that very nearly killed you. You were a resident of the Velvet Room. And that was
it.
Meaning? Why would you care about that? Your one and only purpose was to serve and aid your master to the best of your ability.
You aren't even sure who your creator is. Was it the collective unconscious of humanity? Your master? A third party? Did you just randomly
pop into existence without a reason?
Kyubey brings you out of your panicked downward spiral. "Lavenza?" You look down at the creature as you rapidly regain your composure. "Is everything alright? You appear distressed."
You wave a hand dismissively. "It's nothing." You state firmly as you clear your throat with a small cough. "Anyways, as I told Mami beforehand, I do have three siblings. They are very much like me, residents of the Velvet Room and beings who rule over power."
The alien perks up. "Are they aware of how they were brought into existence?"
"...I've never asked."
It bows its head. "Quite disappointing. We'd hoped for more concrete information." It steps off your Grimoire as it speaks, moving over to the armrest of the bench. "Next question. Do you consider yourself a deity? What do you mean by 'rule over power'? We presume it is a title of some kind."
You raise an eyebrow at the abrupt change in topic but answer nonetheless. "Yes, it is a title, of sorts. You could say… We measure power itself? It is mostly for ceremonial purposes." You hum as you consider the first part of its inquire. "And a deity? Humans do not worship me, so I could hardly call myself a god of any kind."
"An intriguing perspective."
You tilt your head in confusion. "What do you mean by that?"
It does the feline alien equivalent of a shrug. "The very few counted beings who we have encountered that could even come close to your level of individual power tended to possess…" It hesitates for the first time since you've met it. "...delusions of grandeur. Godhood was a common theme among them. We are very glad you are more mentally sound."
Beings that could have power similar to yours? Interesting… "What were these beings like?"
"Mostly anomalies in otherwise unremarkable alien species, though even the most powerful being we have on record is unquestionably trifling in comparison with your prowess. And that leads into our last question, for the moment."
You gesture for it to continue. "Go ahead."
It starts off slowly. "Your soul has been a brimming light on our sensors since the instant we became aware of your presence. It is no wonder you hold such grand karmic potential; we theorize the fate of entire universes will be decided by your will."
...What?
"The consequences of your arrival will be felt for millennia to come. Interdimensional travel and the existence of a multiverse have been theories of ours for eons," it rambles on. "Do you wish to know the true purpose of the magical girl system?"
You frown at the alien. You knew there was something suspicious about all of this… "...True purpose?" You ask tentatively. "Clarify."
Kyubey hops off the armrest, landing on the cemented floor of the stone path. It turns to look at you. "Certainly. The energy produced by the hatching of Witches is unlike anything else we have ever observed. Our most experimental and unreliable of procedures are only capable of generating a mere fraction of the energy amassed by magical girls and Witches in a single day."
"...What would you need so much energy for?"
Kyubey blinks up at you. "To halt the inevitable heat death of the universe, of course."
Oh.
"Everything we have accomplished so far in pursuit of this goal becomes trivial if we gained access to multiple universes. From then on, our continued survival would be assured. It would take an eternity to find a permanent solution, but so long as there are enough universes to harness energy and matter from, we would accomplish it."
"My question is simple," it says. "How did you arrive into this universe?"
What do you do?
[] Tell the truth.
-[] But be vague about it.
—[] In a specific way?
-[] Show him the key.
—[] Make a demonstration of its capabilities.
—-[] ...Take Kyubey to the Velvet Room?
-[] Ask some questions first.
—[] …Heat death of the universe? Make him explain what that entails.
—[] ...Hatching of Witches? If they created the magical girl system in the first place, then where do those dark monsters come from?
-[] Do something else?
[] Refuse to answer. The death of the universe itself? Something's off…
-[] Ask it some questions.
—[] Heat death of the universe?
—[] The hatching of Witches?
—[] Something else?
-[] Make your demands known.
—[] You desire large quantities of human currency.
—[] A smartphone. One that works outside of this world, of course.
—[] Information for information. You have some
very pointed inquiries for it.
—-[] Is it responsible for the current state of Mami's soul?
—-[] Make him stop tiptoeing around the issue. What
are Witches?
—[] Something else?
-[] Do something else?
[] Write-In.
-=-
This is it, the question QB's been dying to ask you since the word 'interdimensional being' came up.
Telling him what he wants will make your potential reward much bigger, obviously.