Frank-Chukwuani made the remarks in Abuja.
The South African anti-apartheid activist, Winnie Madikizela-Mandela, died peacefully on Monday aged 81, following a long illness.
“She died after a long illness, for which she had been in and out of hospital since the start of the year,” Victor Dlamini, a family spokesman said in a statement.
Frank-Chukwuani described Winnie as a Colossus, saying she was a courageous woman who would be remembered and cherished for her defiant role in the struggle and liberation of South Africans against apartheid.
“Whether you like her or not, she remains a role model to most women in Africa as she conquered most of the challenges and betrayals she faced in her life with utmost selflessness, putting her people first before herself.