He might run into trouble with trying to have Chiaki assassinated anyhow - most of the higher-class assassins know her through Akiko and would refuse to take the job (and the lower-end ones would never make it alive). She would probably also turn down a million dollars to go away.





Chiaki has the unique position of being someone who's pretty well connected herself. She's also really difficult to break down or have killed. But because she's not law enforcement or Lair Legion, she really doesn't have much motivation to bother Screwdriver until he becomes particularly annoying to her somehow.

What might really be interesting is to see what happens if the Lair Legion has problems with Screwdriver...but Chiaki is asked by Akiko as a personal favor to stay out of it. She would have some tough choices to make.





I'm sure Champagne had something to resort to, maybe carrier pidgeons?





As an interesting aside I thought of while reading this, have you seen any of the Dexter series? The way he tracks down his "victims" and verifies that they're the right one is one of the sources I draw on for how Keiko used to do her job.





To be honest, in Tom Black's case, Keiko probably would not take that kind of job unless she was really heavily paid for it, and even then maybe not. She wouldn't consider any job with so many variables to be routine at all. If she faces any personal danger (aside from being caught) the price goes way up, and she still may turn it down. It's likely if she saw those orbs as dangerous to her she would abort and turn down the job entirely.

If they were just there to alert him, though, she would use their presence against him and turn them into a trap. That would actually make her job easier.

Chiaki, of course, isn't an assassin for hire, but if she had reason to go after Tom those orbs would not deter her the least bit. She wouldn't care at all that they alert Tom of her presence, because she believes he doesn't have a reason to run from her. She has a calming demeanor and quiet attitude that makes her seem non-offensive and non-dangerous most of the time, and she uses that to disarm many enemies by seeming not to be a threat.