Slavery suspect Aravindan Balakrishnan was more of a "toothless old man" than a "charismatic" figure, according to the cousin of a woman who lived in his commune for more than 20 years.
Eleri Morgan claims her cousin Sian Davies died in 1997 after mysteriously falling out of a bathroom window in the house the group were living in in Brixton, south London. Ms Davies was kept in hospital for seven months after the fall, but her family claim they were not told.
Ms Morgan said Ms Davies wrote home talking of how she was looking after the "mothers of the world" but was not allowed to see her cousin. Her letters always spoke of "comrade Bala" - the name that Balakrishnan was referred to.
Ms Morgan met Balakrishnan at the inquest into her cousin's death. She told ITV News: "I had such a shock because I imagined somebody charismatic and there was this toothless old man - well looked old."
A senior council source confirmed that Balakrishnan and his wife Chanda were arrested last week by police amid allegations that they held three women for more than 30 years. It is claimed they were leaders of an extremist Maoist collective.
The alleged victims - a 30-year-old Briton, a 57-year-old Irishwoman and a 69-year-old Malaysian - are alleged to have suffered years of "physical and mental abuse" at the hands of the pair.
House-to-house inquiries have been carried out in Peckford Place in Brixton, where the three women were found. Police have confirmed that there are ongoing inquiries relating to a total of 13 addresses, all in London, linked to the couple.
The couple, aged 73 and 67, are believed to have been well-known to the police in the 1970s after setting up a communist squat, the Mao Zedong Memorial Centre, in Acre Lane, Brixton in 1976.
Ms Morgan recalled that her cousin had a boyfriend called Martin. She told ITV News: "She was outgoing, we went clubbing in our younger days, enjoyed the good life, and next time I saw her she was in the morgue...
"I picked up the paper and oh my God, Bala and it all came back to me... In the paper it implied they were all foreign students, but earlier they weren't all foreign. I know of Martin and Sian - what he did to our family he did to others."
Balakrishnan was a former member of the national executive committee of the Communist party of England (Marxist-Leninist) but documents show he was suspended from the party in 1974 for pursuing "conspiratorial and splittist activities".
Documents also show how in 1978 police raided the Mao Zedong Memorial Centre, arresting 14 members of the organisation, including Aravindan Balakrishnan and wife Chanda, referred to as Comrade Chanda.
A source at Lambeth Council said the couple were believed to have been in the Peckford Place property for around 10 years after moving there from a council property, and concerns had previously been raised with police about the education of the youngest woman.
Scotland Yard would not comment on the claims, but previously said two of the victims met the male suspect through a "shared political ideology", living with him at an address that was effectively called a "collective".
Speaking earlier, Metropolitan Police commander Steve Rodhouse said: ''We believe that two of the victims met the male suspect in London through a shared political ideology, and that they lived together at an address that you could effectively call a 'collective'.
''The people involved, the nature of that collective and how it operated is all subject to our investigation and we are slowly and painstakingly piecing together more information. I will not give any further information about it.
''Somehow that collective came to an end and the women ended up continuing to live with the suspects.
The youngest of the three alleged victims is said to have written letters to neighbour Marius Feneck, 26, describing her life as being "like a fly trapped in a spider's web".
The woman wrote more than 500 letters to him in seven years, the Guardian said, after becoming infatuated with him.
One letter apparently told of the "unspeakable torment" she suffered behind locked doors and windows, and of how she was terrified that her captors - "these evil criminals ... who dare to call themselves 'my relatives'" - might do something to him.
The case came to light after the Irishwoman rang the Freedom Charity last month to say she had been held against her will.
Scotland Yard said that part of the agreement on October 25 when the women were removed from the address was that police would not take any action at that stage.
None of the women was reported missing after being rescued, police said, and all three are now in the care of a specialist non-governmental organisation.
Officers have recovered a birth certificate for the 30-year-old woman, who is alleged to have lived her entire life in servitude, but no other official documents for her have been found.
The couple, who are of Indian and Tanzanian origin and came to the UK in the 1960s, have been released on bail until a date in January.
As the couples' south London home was boarded up and guarded by officers yesterday, a Lambeth Council spokeswoman said the case was "very complex", dating back decades, and was a police-led operation, adding: "We are working very closely with police."
They said it was "too early" to provide the detail of any contact they may have had with them, adding: "Right now the security, confidentiality and well-being of those involved is paramount."
Aneeta Prem, founder of the Freedom Charity, issued a statement calling for the media to respect the privacy of the alleged victims.
"Freedom Charity are very concerned about the amount of media speculation there has been regarding the identities and past lives of the three women rescued from south London," she said.
"Of primary concern to us is their safety and wellbeing. However, the more information there is that comes into the public domain, the more it will hamper their recovery.
"I would ask you to respect the need for the three women's privacy at this critical time, as they start the healing process."