Mitski was born Mitsuki Laycock on September 27, 1990, in Mie Prefecture, Japan to an American father and a Japanese mother. Her first language was Japanese. She moved frequently while growing up due to her father's job at the United States Department of State, living in Turkey, China, Malaysia, the Czech Republic, and the Democratic Republic of the Congo before settling in the United States.

^ Wikipedia

What kind of "foreign service officer" (as he calls himself) spends almost a decade in Zaire? Mostly a meme that got way outta hand on Tumblr years ago, with people writing crazy fan fiction about how her dad's a war criminal. But chances are he was CIA, since he was fairly senior in the State Department as a foreign service officer for like two or three decades. Not guaranteed CIA, and an analyst role at best, but very probably was working for the CIA in some capacity.