"Where's business mode Si-yeon gone?" wonders Hyun-jae, sitting on a cushion next to Juheon.

(Who wraps an arm around her.)

"He'll be here once we've officially started."

Chun-hee is the last one to sit down, between Woo-young and Si-yeon. "Let's start, then."

"Very well. Now we focus on control security: how to make sure Kang Jaeha can't affect us, or that he's caught if he does. We've already got a few ideas, plus all of the reactive location security-increasing measures are also control security-increasing measures." He adds them to his fake blackboard: body cams (↑ control, = location, reactive) plus their footage being reviewed in real time (↑↑ control, ↓ location, proactive, with a side note that it's uncomfortable), civilian onlookers (↑ control, ↓ location, neutral) using instagram (↑↑ control, ↓↓ location, neutral), media (↑↑ control, ↓↓ location, proactive), media being told to not broadcast stuff live (↓ control, ↑↑ location, proactive), guild-controlled cameras onsite (↑↑ control, ↓ location, proactive), going into dungeons (↑↑ control, = location, proactive + reactive) unless Kang Jaeha manages to get into the dungeon anyway  (↓↓↓ control, ↓↓↓ location).

"What else do we have?"

"Woo-young, you don't need to know where someone is to teleport them, right?"

"Right, but the backlash cost gets really high; if I know literally nothing about where someone currently is and they turn out to be on the other side of the globe that might kill me on the spot. Add it to the list anyway, though, it's good to have as an option, you're right."

"What if you know their general location via GPS?"

"...like, giving them a tracker or something? That basically solves the increased cost issue."

"Hmm, a tracker by itself doesn't increase location security—if anything it reduces it, since the GPS information being available anywhere can be risky, but only a little bit—and it does increase control security." Reactive, though.

"There was the AI facial recognition idea, too."

"Right! There was that." Added.

"Would the onsite guild cameras be able to make use of AI, too?"

"Probably but we're still trying to avoid sharing the information that Kang Jaeha is a suspect, right?"

"Why are we? If he's a suspect in the actual shooting, isn't that... definitionally the kind of thing we might want to share with others?"

"I'm not saying I necessarily disagree, but there are a few things we need to consider before we do something like that."

(It's like he's a different person, when he's doing this.)

"First, there's always the problem of image. Since he's a public figure, if we spread this around he can sue us if we don't have hard proof due to the damage to his image.

"Then there's the problem that if he knows we're onto him he can work even harder to cover his tracks, or he can become more dangerous; I can dodge bullets and Juheon can tank them but the three of you aren't immune and we want to avoid that risk if we can. 

"And there's also the part where knowledge of Kang Jaeha's powers is secret, which even beyond the NDA makes it harder for us to prove wrongdoing. It's a very convenient excuse, to say that his power means that he needs to be placed in solitary confinement and communicate only via video, isn't it? People would definitely be suspicious."

"Tae-gun's word is worth a lot, though; he's famous, hardworking, has personally saved thousands of people and closed more dungeons than any other esper in the country..."

"Kang Jaeha is also famous, if somewhat less so, so it's not that straightforward, and again we don't actually have hard proof yet."

"Would it be possible for the cameras to do the AI thing without us having to inform someone that they should be looking for Kang Jaeha specifically?"

"This is honestly the sort of thing I'd want to ask Tae-gun about," Woo-young says after a beat of silence.

"We'll put a pin on it and he'll be able to opine in the morning."

"Woo-young, do you know how come Kang Jaeha's power isn't detectable by other espers?" The constraint of "no other espers can check anything directly" is quite stifling.

"Yeah. His power isn't really creating anything fake, exactly? When he makes you see a visual illusion, your actual visual nerves are actually being physically affected the same way they would if actual light had hit them. A better way to think of them might be imagining that he's causing a personalised hologram to appear, one that really is out there, so the fakeness isn't really in people's minds, so to speak."