Three months' isolation was one of the first steps in recovery following the procedure, which Briar entered when she returned home in November last year.
Only select family and friends were allowed to visit, however, that was slowly relaxed as Briar's health improved.
"It was difficult because I'm so used to being around lots of people, but over time I was getting better, less tired and didn't fall asleep every five minutes" she said.
"I just kept doing little exercises to get me back to work."
Although Briar Novis can only manage working two hours a day, four days a week at Countdown right now, she said she's grateful to be back, and has been told she can take on more hours when ready.
"My workmates have been really good and customers are really happy to see me back, everyone is just so friendly," she said.
Mum Cherry Novis said it's been a rollercoaster ride of emotion from learning about her daughter's diagnosis five years ago, to Briar being able to return to work.
"As a parent, it was really hard to watch her go downhill but to watch her comeback is amazing," she said.
"It's just lovely to see her progressing so well and looking so healthy."
Briar Novis said she's thankful to everyone who donated money and helped with fundraising for the treatment.
"For all they did for me and to help me, it actually worked… I feel like I'm getting my life back."
