[X] Plan Diplomatic Offense
-[X] Whom to take along and why:
--[X] Viserys - Talking with Ned about the urgent matters at hand and general politics. Take a long the remaining items in the pile earmarked for sacrifice, in case you will need them.
--[X] Rhealla - Talking with Catelyn, since she knows what it's like to lose family.
--[X] Dany - Talking with Jon, since she has somewhat of a friendship with him, and has experience with dead brothers.
--[X] Richard - To stand in the corner and scowl.
--[X] Rina and Vee - Look over the attackers corpse and scan the keep for signs of it's activities. How it got in, other victims, potential traps left behind and so on.
-[X] First and foremost, offer you condolence for the events that transpired.
-[X] Get his permission to check Winterfell for further intruders and other surprises left behind (Rina and Vee) while getting Dany to Jon under the pretense of debriefing him to not arouse too much suspicion about how they know each other.
-[X] Divine if Robb can be resurrected:
--[X] If yes, offer him to see if you can resurrect his son, with the caveat that the nature of the creature that killed him might have made that impossible. Results you got when attempting to resurrect persons killed by or connected to the void varied. Worst case, his soul is gone for good and you will only animate they body as a wight. (Insist on calling it "the body" in this context, so that he and Catelyn get it into their head that their son is nor a pile of meat and vice versa, just in case that really happens.)
---[X] Toss as many sacrifices as necessary on that project.
--[X] If not, throw the book at them what the Others are, why they are bad news and that they can kill something beyond all recovery. If they still insist or give off the impression of trying anyway, offer them to do so, but tell them flat out that you will likely just animate the body as a Wight since their son is gone for good.