The rally will be the fifth to be organised by Bersih, which means "clean" in Malay.
"The government has tried to bully us into keeping silent, but many Malaysians are now sick of the threats and are realising keeping quiet is not going to change anything," Chai said.
"I decided quite recently that I can't be afraid anymore, it is my right to speak and if I see my Government doing something wrong then I'm going to stand up for what's right."
She said the rally was to demand for free elections, clean government and for the prime minister to step down.
"I will not be bullied and I'm not afraid of their threats," Chai added.
Malaysian media reported this week that the leader of a pro-government "red shirt" movement Jamal Md Yunos is accusing the Bersih movement of having links to the Islamic State militant group.
A 22-page document on the matter had been submitted by Jamal to the Malaysian police, the Star reported.
Chai, who is also treasurer for the Global Bersih steering committee, said the claims were "baseless" and aimed at discouraging people from attending the November rally.
Auckland Malaysian Society president Francis Chai said he would not be attending the protest and the society's rules prevented him from making any comments.
Last year, Malaysians in Auckland also protested in solidarity with the tens of thousands who had taken to the streets of Kuala Lumpur for the same reason.