Fernandes left Goa, a former Portuguese colony in southwest India, to study psychology at Bangalore University and then moved to New Zealand when her father found a job with the Counties Manukau District Health Board. About two years ago, she was drawn into a boxing class at Les Mills World of Fitness.
"I wanted to do something that I didn't think I would be good at - something different, a challenge. I didn't have to be good at it, I just wanted to give it a go with no pressure. But suddenly I found myself punching bags as hard as I could and I loved it." In one of her first competitive fights, Fernandes won a national trial that saw her chosen for the 2010 women's world championships in Barbados.
She lost to eventual bronze medallist Nemedi-Varga of Hungary in the second round of 54kg competition. Since then, she's captured a silver medal at this year's Arafura Games in Darwin and lost to the eventual winner in the second round of the China Open.
Dropping to the flyweight class means Fernandes, even at 1.63m, is often taller than her opponents and can dominate them physically.
"Siona's really taken to things quickly and achieved a heck of a lot in the short time she's been boxing," says Martin. "That scientific award shows her performances were far more technical and she shone above everyone else skill-wise."
The exact path Fernandes must travel to London is sketchy. Women will contest three weight categories at the Olympics - flyweight (51kg), lightweight (60kg) and middleweight (75kg). The quickest and most obvious route would be a top eight finish at next year's world championships in May/June. While the men can also earn selection through continental qualifying events, the women's criteria is still being decided.
So, right now, all eyes are on the world championships: "It's not going to be easy," says Boxing New Zealand chairman and high performance manager John McKay. "It's a hard format, but Siona is a good competitor - quite strong with good boxing skills."