Manson's attorney Howard E King responded: "These claims are provably false. To be clear, this suit was only filed after my client refused to be shaken down by Ms Bianco and her lawyer and give in to their outrageous financial demands based on conduct that simply never occurred. We will vigorously contest these allegations in court and are confident that we will prevail."
Manson and Bianco began a long-distance relationship later in 2009, the suit says.
Manson again brought Bianco to Los Angeles in 2011, ostensibly to appear in his feature film "Phantasmagoria", though that project also never materialised.
During that visit, Manson would not allow Bianco to leave home without his permission, chased her around their apartment with an ax, cut her with a "Nazi knife" without her consent and photographed the cuts and posted the pictures online, also without her consent, the lawsuit alleges.
"It took Ms Bianco years to understand the extent of Mr Warner's physical, sexual, psychological, and emotional abuse. Her career suffered due to the deterioration of her mental health," the suit says. "She deals with complex post-traumatic stress disorder, anxiety, depression, and panic attacks to this day as a result."
The Associated Press generally does not identify people who say they have been sexually assaulted, but Bianco said in a statement she is coming forward publicly to air her allegations, hoping others will do the same.
The lawsuit said, at the time, Bianco feared for her safety if she didn't comply with Manson's demands and did not go to authorities. But her attorney, Jay D Ellwanger, said she had now come forward and spoken to the FBI and local law enforcement.
Bianco first aired many of the allegations in February. She was one of several women who spoke out after actor Evan Rachel Wood said on social media that Manson sexually, physically and emotionally abused her during their relationship. Manson's record label and agents dropped him at the time.
In response to the allegations in February, Manson wrote on Instagram that they were "horrible distortions of reality".
"My intimate relationships have always been entirely consensual with like-minded partners. Regardless of how — and why — others are now choosing to misrepresent the past, that is the truth."
Los Angeles County sheriff's detectives also said in February they were investigating domestic violence allegations against Manson dating from 2009 to 2011 in West Hollywood. They did not identify the woman who made the report.
Bianco played Ros in the first three seasons of HBO's "Game of Thrones".
