Kai seems like just the sort of friend Mercy needs to make, I'm definitely interested in taking you up on that offer. Since meeting Mercy means that she would be in the same area as Zhevra I can see him deciding he has a crush on Mercy's friend and flirting with her if you'd be interested in that.
Anyone can attempt to become a Knight, however it mostly depends on the Soquili and how they devote themselves to their training on if they get there or not. Ironforge is a wow cosplay, so along with many of the other wow cosplays we said they came from lands far away known as Azeroth.
Mercy tends to be really good at trying to bring people out of their shell - and she's far more outgoing/less gruff then Ironforge, however she could easily meet both, perhaps Ironforge finds her near the herds lands and asks why she's there? Mercy could then come in and make things a bit less possibly confrontational for your poor girl?
Jorm would love to meet Demon, Jorm wants to meet all the Kalona he can and attempt to sway them to his cause etc lol
Zhevra could certainly use a bit more responsibility in his life, he's technically already supposed to be training under Ironforge..but I could easily see Ironforge sending him off for a bit of training under someone else in the hopes that Zhevra will decide to listen to him more then he does his own father.
I could see Zangar and Vesper getting along pretty well and getting into a lot of trouble too - of course it might also be fun to have an RP where Zangar tries to talk your girl Aellai into something possibly dangerous as well, so I'm up for either of these two.
I an TOTALLY up for an RP with Jormungander and your girl - did I mention I love love love battle or fight RP's? =-) Jorm would likely try to kill her however it's easy enough to figure out a way/reason for how she would escape or get away from him. I'm up for pre-planing the fight if you'd like her injuries to happen in a specific manner. For fight RP's I follow the no god-mod, no power play type of fighting..in where I'll post my boy attempting an attack and any damage and whatnot your girl takes or doesn't take is completely up to you and vice versa. I"m a big believer in taking damage in fights as well, so Jorm will get hurt too but hey he's a warmonger - he ought to be used to it lol