Pascual Rose is a sometime agent with the CIA.
For several years, Rose was the man to see if you were a terrorist group and you needed a dependable courier. He was known as for being totally trustworthy and as a result, he knew a great deal about all the groups and seemed to be untouchable. He was, as a CIA agent once put it, their "unified field theory" or the lynchpin that connected the various groups.
For many years it had been wondered how such disparate groups as the PLO which hated anything Jewish or Christian, would have dealings with the IRA which hated anything not Catholic and Japanese Red Army which hated anything non-Japanese and groups like Baader-Meinhof which hated just about anything, period, including many of its own people. And yet there had been many apparent interactions and trading of info and resources and even money from time to time.
Rose was that connection. He spoke many, many languages easily and natively. He understood and agreed with many of the causes and did not criticize any of the others and, because he was not an active member of any of them and was not wanted by any government for any crime, he could move freely and without suspicion.
One aspect of his job that he kept constant and of which he was very proud was that even though he was helping all these different groups perform horrendous acts of violence, he had never killed anyone himself. To most others his aiding and abetting meant he was as guilty as the rest but he did not see it that way.
Then one day he changed sides. He walked up to a CIA agent, let him know who and what he was, and offered to help become an informer to both Mossad and the CIA. He became one of THEIR best weapons in the fight against an enemy which knew no borders. He played the double for as long as his nerves would last. He gave reasons for his change but no one knew if he was telling the truth about it. They just used him for as long as they could.
Then he disappeared.
Rose is listed as American as he was born of an American father and has citizenship. He spent a few years there but when his parents divorced, his Spanish mother took him back to Spain and later to France to live, giving him a cosmopolitan upbringing and allegiance to no one.
Rose has no real nationality because he has no real affinity to any country. He is as much a loner as one would care to be. Probably more than one would care to be.