This is the unknown person - Israeli Prime Minister Ehud Barak:
"Giuffre simply referred to the deranged man as the “Prime Minister,” saying she was afraid the brute would “seek to hurt” her if she printed his name.
In the past, however, she pointed to Israel’s Prime Minister Ehud Barak in court filings as one of the many elites who had raped her, a claim he has repeatedly denied.
In her memoir, Giuffre said she first met the “Prime Minister” on Epstein’s private island in the US Virgin Islands sometime in 2002, when she was just 18.
She was ordered to escort him to a cabana, but the man made it clear as soon as they were alone that “he wanted violence.”
“He repeatedly choked me until I lost consciousness and took pleasure in seeing me in fear for my life. Horrifically, the Prime Minister laughed when he hurt me and got more aroused when I begged him to stop. I emerged from the cabana bleeding from my mouth, vagina, and anus. For days, it hurt to breathe and to swallow,” Giuffre wrote.
“I had to accept that Epstein meted out praise merely as a manipulation to keep me subservient.”
nypost.com
"Barak was a personal friend of Epstein’s and used several million dollars of Epstein’s money to finance a security company."
Guessing the Israeli Prime Minister must actually have been be a KGB spy...