Emmeline: ROOMIES! He probably cleans up after her automatically all the time, like if she happens to push the coffee table a few inches...back it goes. >.> He doesn't mind that she probably can't exactly follow everything the way he needs it. He just puts it back. This will probably just play out in the background of roomie times. XD
Harry: Kings is glad to have finally met/talked with Harry again at the meeting. He's been looking for him for a long while, though taking extra steps to make sure any looking he does doesn't help so death eater-y type or even complacens-ed. He definitely would have tried to find time to have talked with him or him & Hermione/as few as possible privately at/after the meeting. They need to be organized and actually Do Stuff.
Kevin: Kings is mildly amused by that, and he sort of gets the reference (woo working in muggle world/being part of the gossip chain as a secretary). He's glad to see people on the run are doing alright.
Draco, Millie: He's not fans at all. Draco...very obvious reasons. Millicent...doesn't seem the type of Death Eater he'd easily get along with anyway, though he can be polite/mask that at will.
Marek: There's definitely conflict on Kings's side too. If they met pre-dark mark that'd give more potential there, then more conflict that he can't talk about with him (obviously).
T: Kingsley is probably a bit wary of T, and he definitely will not forget T or Ella's faces. I'm not sure how his personal feelings will be toward either of them pre-writing interactions. But feelings and What Must Be Done can be tots separate, so that if they turn against Potter/Uprising, they are dead meat in his books. And they don't scare him (wary/learn about them yes, but Kingsley doesn't see the point in fearing DEs). Er /ramble
Theo, Patience: Agreed on the doubtful, but he's a pleasant friendly guy with strangers generally, so woo.