A vegan feminist charged over the samurai sword killing of an aspiring rapper once branded herself a murderer for picking a flower.

Hannah Quinn, 23, and her actor boyfriend Blake Davis, 28, were charged over the murder of Jett McKee, 30, in the inner-city Sydney suburb of Forest Lodge on Friday.

The pair spent three days on the run before handing themselves into police on Monday after allegedly killing Mr McKee when he tried to rob their granny flat.

A keen advocate of veganism on Facebook, Ms Quinn was photographed wearing a 'meat is murder' T-shirt and wrote about getting upset about picking flowers.

A keen advocate of veganism on Facebook, Ms Quinn is photographed wearing a 'meat is murder' T-shirt (pictured) and wrote about getting upset about picking flowers

Actor and martial artist Blake Davis (pictured) allegedly killed rapper Jett McKee with a samurai sword

Ms Quinn and Mr Davis spent three days on the run before handed themselves in to police on Monday after allegedly killing Mr McKee (pictured) when he tried to rob their granny flat

'I hardly ever pick them anymore and if I do, I get really upset with myself - murderer!' she wrote during a conversation about killing flowers

'I hardly ever pick them anymore and if I do, I get really upset with myself - murderer!' she wrote during a conversation with her mother.

Ms Quinn's mother Megan said she was proud of how her daughter was coping behind bars, although her lawyer painted a different picture.

'Hannah is amazing and doing amazingly well tonight. I'm very proud of her,' Megan Quinn said, The Sydney Morning Herald reported.

But Ms Quinn's solicitor Lauren MacDougall told reporters outside court on Tuesday her client was 'very distressed - it's her first time in jail.'

In addition to her posts about the meat industry and feminism, Ms Quinn made Facebook posts criticising the police.

'Every single cop is complicit in a system designed to uphold the capitalist oligarchy we live under,' she wrote in one social media post.

A vegan feminist (pictured) charged over the samurai sword killing of an aspiring rapper once branded herself a murderer for picking a flower

Hannah Quinn, 23, and her actor boyfriend Blake Davis (pictured), 28, were charged over the murder of Jett McKee, 30, in the inner-city Sydney suburb of Forest Lodge on Friday

She also shared articles about police officers being charged with rape, former officers being given identity cards, and the police 'controlling' poor people.

The barista and her boyfriend are believed to have hidden out in an alcove near their granny flat until turning themselves in over Mr McKee's death.

Mr McKee, whose stage name was Scepaz, allegedly broke into their home wearing a balaclava and armed with knuckledusters and a replica gun about 1pm on Friday.

Mr Davis and Ms Quinn then allegedly chased Mr McKee down the street where he was allegedly stabbed with a samurai sword from Mr Davis' collection.

The barista (pictured) and her boyfriend are believed to have hidden out in an alcove near their granny flat until turning themselves in over Mr McKee's death

Mr Davis and Ms Quinn then allegedly chased Mr McKee down the street where he was allegedly stabbed with a samurai sword from Mr Davis's collection (pictured is a blood-smeared car at the scene)

A neighbour who lived in the apartment next door to the granny flat in Forest Lodge said he heard a woman running down the street screaming: 'What the f*** are you doing?'.

He said he rushed outside expecting to see a domestic dispute unfolding.

'Then I saw [two people] both running back [from the alleged murder scene]. He was only wearing rugby shorts - that's all he had on.

'But he had a big bag over his shoulder - like a garbage bag.'

'Then I spoke to people who walked to the scene. They said ''he's dead''.

'One of them pointed to blood on the road and said ''I think that's brain matter''. That's how badly he was hurt.

Mr McKee, whose stage name was Scepaz, allegedly broke into their home wearing a balaclava and armed with knuckledusters and a replica gun (pictured) about 1pm on Friday

A number of swords believed to belong to Mr Davis - a martial artist and television actor - were allegedly found in the flat by police.

Police allegedly recovered more than $20,000 in cash while searching for the couple after Mr McKee's body was found.

Mr Davis also did not apply for bail during video link court appearance, and will reappear in the same Newtown court on October 9.

His lawyer Sherleen Chand said Mr Davis intends to plead not guilty and suffered 'quite significant' facial injuries in the alleged violent incident.