OOC:
You mean the Ryo Diplomat? No, she rejoined you all. The person down the hall looking a quizzical is - presumably - some employee who's supposed to be in these halls. They are wearing a uniformed jumpsuit much like many other in-lookers you've all passed by, anyway.
Of note, Stimpaks only recover Wounds. One of the few ways to recover Strain in a moment like this (aside from spending Advantage) is to "take a minute", basically sit down and rest/gather yourself and make a Simple (Zero Dif) Cool or Discipline check, successes = Strain recovered.
However, I'm currently engaging you in basically a "mental/social combat" encounter, so you can't "take a minute" until that encounter is over (when u get out of the halls)... If you exceed your Strain Threshold, you don't go unconcious or anything, you're just "out of the encounter" overwhelmed, mentally exhausted, whatever, the result being that Rossa is not gonna have any IC control/recollection of what happens from that point to when the encounter is over. Basically, I can do something(s) "behind the scenes" that you guys won't know about.
RE: the Triumphs, you could have something equivalent to "turn the tides of battle" happen - standard Triumph expenditure, a helpful employee comes along maybe? If you're concerned about your Strain, you could use a Triumph to recover 1, though that's a very expensive Strain to regain. You could upgrade a future check? As a narrative effect you could successfully commit to memory the location of that intersection? Let me know what sounds groovy.
Also, I'm realizing I never really gave you anything for the successful Perception check...
Just as Rossa turns to go, leaving the scene of the Ryo diplomats disappearance, he notices something glinting in the light rolling around on the floor. A loose screw? That's the only sign of disorder he's seen on all his time in these back halls...