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...