One method I use to figure out who’s who when players are swapping characters around in their profiles is I’ll mouse over their character in the sidebar/watchlist (or in the room’s character list) and click the ‘notes’ function.
I’ll usually write things out like, for example
Frank:
- Knows Philip
- Knows Dave
Jessie:
- Knows Dave
etc, etc. That way, you’ll know the character, and who that character might know of yours. 
