KIEV, Ukraine—Embattled Libyan leader Moammar Gadhafi is set to be deserted by another close ally after his Ukrainian nurse said she was heading home.

Galyna Kolotnytska, described in a diplomatic cable published by Wikileaks as a "voluptuous blond" who "travel[s] everywhere" with Col. Gadhafi, called her family in Kiev on Friday to say she intends to return to Ukraine, her daughter told daily Segodnya.

"Mom got in touch yesterday. She said she was now in Tripoli," Tetyana Kolotnytska said. "She spoke in a calm voice, asked us not to worry and said she'd soon be home."

According to the cable from September 2009, contacts in Tripoli told U.S. diplomats that Col. Gadhafi "relies heavily" on Ms. Kolotnytska, then 38, as "she alone 'knows his routine.'"

The cable also reported claims from unnamed sources that the eccentric Libyan leader and the nurse, part of a retinue of four Ukrainians, "have a romantic relationship."