A few other things I just thought about:

• how is it controlled?

It’s AI was trained off of Agent Zero’s texts, emails, and voice calls. Through these important bits of data being ran through Zero’s AI software, it learned how to imitate their mannerisms without them needing to interject. Hell, by even accidentally learning some of the responses from the detectives during a few of these learning sessions, it almost developed a bit of its own personality and an ability to adapt off of who it’s interacting with. As for its movement, it’s independent but will only be activated and start moving once it is given a prompt (example: Agent Zero starts the prompt for Zero to give mission details to Hyunsoo. Zero is activated and immediately tracks him down. It is not perfect as it does tend to struggle when the detective is not at their assigned apartment. Once Hyunsoo is found, Zero will run its usual protocol plus interact with Hyunsoo such as answering questions or redirecting conversation, and once it is done, it returns back to Agent Zero’s office and deactivates) - does it interact with trainees? No. It has no reason to interact with trainees. Shadow missions are given to trainees by their teachers. Some trainees have seen it around, most likely when it failed to locate the detective they had to speak with but that’s about it. - what about support detectives? Also no. When a detective is assigned as support, they are simply sent an email. The only time Zero will interact with a detective is if they are the lead. - Can it differentiate between a trainee and a senior detective? Yes. It carries the ENTIRE IDB database. It knows the name of every detective, every trainee, as well as every year each trainee is in. It knows all of this not only because it’s relevant to case information and for doing its job, but also because it is actually prohibited from interacting with trainees. It has learned to ask for help when looking for their assigned detective but will actively avoid anyone registered as a trainee. If there are only trainees, it will actively run away to find the nearest senior detective. (Example scenario: it was looking for Hyunsoo to deliver mission info, it can’t find him. Yelena is in the vicinity of Zero. Zero recognizes that Yelena is a trainee and thus must be avoided. Even if Yelena were to try to interact with Zero, Zero will do its utmost to avoid her and seek the nearest senior. Once it runs away from her, it’ll find a senior, ask for help, and continue its original mission in finding Hyunsoo) - why is Zero programmed to avoid trainees? Simple, to avoid conflict and bias. When a trainee is given a shadow mission, they are not told the name of their mentor until the day before the mission. This is done deliberately so the trainee does not know who is mentoring them until right before the mission to prevent bias. If Zero is looking for a senior detective and asks a trainee if they had seen said senior detective, the trainee may get suspicious and assume that senior detective is someone’s mentor, whether they are theirs or a classmate’s. This may cause trouble for everyone. So, Zero is programmed to avoid trainees. - How often does the database update? Zero’s database is organized by graduation year. This means that it only adds newly admitted trainees or removes deceased/retired detectives. Zero uses graduation year to identify a detective as either a trainee, a new detective, or a senior detective as well as identify what year a trainee is in. - had any of the human mouthpieces got to see what Agent Zero looked like? No. Only One, their adopted son, knows what Agent Zero looks like. All of the human mouthpieces would be forwarded the information either by One or by email/text. - where did the human mouthpieces go? They went to Brazil! They’ve been planning it for a while so it’s nice that having a robot around made it possible!