With four gold and three bronze, the Australian won the most medals by an individual athlete in Tokyo. She is now tied with gymnast Maria Gorokhovskaya for most medals ever won by a woman in a single Olympic Games. Aged 27, she won her gold medals in the 50 and 100 metres individual freestyle, followed by 4x100m medley and freestyle relays. Yet she might not have been in Tokyo at all. Two years after starring at the Youth Olympic Games in 2010 in Singapore, she came close to walking away from the sport after not making the Australian Olympic team for London in 2012. After a lengthy break, she changed her mind, returned to the sport and has been collecting medals ever since.