Hi Cassie! Vera here would be polite to Nicolas, but I doubt they would be very close beyond that. But my other royal, Kris (norgeprins) would probably know him pretty well and would encourage him to lighten up. You know, as much as the ruler of a country can.
I also have Conall (caniblowitup), head of the Scottish militia, who might know Karoline. His preferred method of handling things is to blow them up.