The bar was...unusually reticent, in the lower layers of her mind (and she hadn't pried further; she wasn't sure if she'd be noticed; she wasn't sure if offending would get her kicked out, and regardless of whether it was actually safe it was safer than anywhere else she'd been for the past...three years?) so she couldn't be sure this place wasn't really a trap of some kind, but the higher layers gave a plausible explanation that didn't involve being a trap, and whatever else it was warm and dry and had food. Her guard was probably a full 25% down. Positively trusting, these days.
"Given that my kind of magical girl powers are verifiably granted by a thing and don't have an obvious power source like human emotions I can't help but wonder if there's some kind of--persistent connection. That syncs time. D'you think I"m reaching?"
"Nnnnot necessarily. But this means it can sync time even while I'm screwing around with it."
"Is that a bad thing? As long as there aren't any other of my kind of magical girl in your world, anyway."
"Not necessarily, but it means I have to be exquisitely careful not to let any fluffs out of the world because I am exclusively traveling through time within it."
"Yeah, I still don't know what would happen if you were in my world when I went back."
Nod. "...I hope no one else from my world gets doors and is bringing people home. Eegh."
"That would be horrifying, but unless one of us discovers this happening it's not a terribly actionable horrible thing."
No.
"Okay, so at least it doesn't happen by default somewhere I'm not normally affecting like, I don't know, Senegal."
"Yeah. ...If you bring someone in here from your world and we take them home, what happens to them, I wonder?"
"...Possibly there winds up being two of them, so, I wouldn't want to do it casually."
"I wouldn't either, but if for some reason it seems like a really good idea, forking is a less drastic failure mode than death."
"I wonder if you can get spells specifically to deal with the way the fluffs-in-particular are obnoxious."
"Something to--disrupt communication, or make it harder for them to observe you, or something like that."
"Maybe. Although if I only had a partial fluff-disruptor I'd worry it would make them more eager to disrupt me back."