^^She's right, you'd want to be careful about things like that. @[member="Cade Lee "]would be quite well known, but I doubt most would have heard of @[member="Jacen Cavill"].
As for my characters, here's about what you could expect:
Emberli - He never told anyone his name, so far as I can remember, so people would know him as Bear. But he'd be widely known. He lead the Mandalorians when the Sith invaded Mandalore. If he weren't well known something would be wrong.
Disciple - He's nearly ephemeral, scary and just downright crazy. Most would think him nothing more than a scary story to use on their children to get them to behave. I doubt people think something like him exists.
Sarge - This a tougher one. Cira was a well known head of government, by necessity this means 99% of people know of her. This also means that, due to her station, most people would know of her guard - the gruff Sergeant. But he'd be more of a gossip piece, I think, than anything. Who is he? Why is he always the one guarding her office? What's he actually look like? I doubt anyone would know him as some kind of stealth master or anything. Nah, he's that dude that's in the spotlight because he's not, but even then he's like, Page 15 gossip column.
On the flip side, Sarge is widely known by those in power for what he really does. But that's another story entirely.