She looks alarmed. "How many monsters are there? Like, per capita or per area or whatever."

"...I can usually find one when I look? And I think most girls can."

"Why do we not hear about people being killed by these things more often? Non-magical people."

"It looks like other kinds of death. Suicides and murders usually, which can look like accidents, or sometimes - diseases or poisonings or other things."

"Do you know what the ratio of monster-deaths to real-deaths in those categories is?"

Headshake.

"Okay, I'm gonna see if I can find anything out about that. It sounds really worrisome."

"...more than monsters killing people some other way?"

"If monsters killed people some monster-specific way, the fact that you don't hear about people being killed by monsters would indicate an upper bound on people killed by monsters. You hear about people dying of suicide or murder or accident or disease all the time."

"I don't think it's all monsters. But I don't know how much."

"It can't be. Diseases are definitely real and accidents definitely happen and I would be astonished if people never killed themselves or each other without monsters being involved. But a lot of it could be monsters. And it sounds a lot easier to solve 'monsters' than all the reasons someone might decide to commit murder on their own."

"This would kill all the magical girls," she mentions.

"It would?"

"We need monster seeds."

"Okay...would it be possible to domesticate monsters? Keep them contained and away from people? Maybe feed them animals?"

"I don't think they eat animals but maybe there are some that can."

"Okay, then, solving the problem of monsters would involve finding some that can eat animals and breeding them somewhere they can't get at people before wiping out the other ones," she says decisively. 

(Wei Ying is so good.)

"That sounds like a pretty good idea."

"Thanks! You've been really helpful."

"Thanks for the food."

"You're welcome!" she says, blithely overlooking the fact that Lan Zhan totally paid for the food. 

Lan Zhan doesn't have a lot of actual cash on her, but this woman was collecting recyclables for redemption, she clearly needs whatever she can get. She digs a couple of twenties out of her bag and presses them on the woman. 

"Thank you for your patience."

"Oh, I - thank you." She is not especially in a position to turn down a couple twenties. They go in a hoodie pocket.

"You are welcome," she says, before departing with her friend.