Noting that there was an aura about her which was "difficult to explain but impossible to ignore", Mukherjee said in his new book 'The Coalition Years' that she had built her career fearlessly and aggressively and was the "outcome of her own struggle".
"Mamata Banerjee is a born rebel," he wrote, adding that nothing illustrated this trait better than an episode in the West Bengal Congress organisational election in 1992, in which she was defeated.
The former president recalled that after media reports said the top leaders of the West Bengal Congress, including Banerjee, wanted a consensus election to avoid an open contest that could bring out "ugly factionalism" in the party, then prime minister and Congress chief P V Narasimha Rao asked him to mediate and find a solution.
"One day, during the winter of that year, I requested Mamata Banerjee for a meeting to discuss some of the observations she had made about the process (of organisational elections).
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Banerjee went on to accuse him and others of "distributing organisational positions" among themselves, "thereby thwarting the electoral process", he wrote.
Mukherjee said he was "flabbergasted by her reaction and wild allegations" and told her that a compromise formula was being devised at her request and that of other leaders.
"Having said that she left the meeting in a huff. I was stunned and felt humiliated and insulted," he wrote.
The former president said she lost by a very narrow margin to Somen Mitra in the election for the post of the WBPCC president held through a secret ballot.
"I was present when that result was announced. An angry Mamata came up to me and asked, 'Are you happy? Has your desire to defeat me been fulfilled?' I told her that she was totally mistaken," Mukherjee recalled.
The former Congress leader also said the evolution of Mamata Banerjee as a political leader of substance was an important episode in the contemporary politics of West Bengal.
"She has built her own career - fearlessly and aggressively - and what she is today is the outcome of her own struggle, labour and hard work. She has an aura about her which is difficult to explain but impossible to ignore," he said.
He also said Banerjee emerged as a force to reckon with after the Kolkata plenary in 1997 as has had a spectacular political career.
"This was a splendid victory and she appeared to be truly a giant killer. Throughout her subsequent political life, she has always faced tough challenges bravely and tried to convert them into opportunities," he said.