When Nelson Mandela was released from prison in 1990, Zelda la Grange had no idea who he was. In her Afrikaaner family, he was simply a “terrorist.” She was in her twenties and would soon become Mandela’s personal assistant, and later, a close friend.When Nelson Mandela was released from prison in 1990, Zelda la Grange had no idea who he was. In her Afrikaaner family, he was simply a “terrorist.” She was in her twenties and would soon become Mandela’s personal assistant, and later, a close friend.