She is in her final year at school, and as well as leading her peers through two chapel services every week as head girl, she is an elite sportswoman.
Despite being the present holder of the New Zealand women's under 19 1500m title and silver medallist at the 2010 Junior World Cross Country Championships, she's exceptionally humble about her numerous achievements.
It's hard to imagine the kind of discipline and determination it would take to train as hard as Becky.
But when asked about it, she simply replies, "The harder you train, the easier it is to race well.
"And also the satisfaction of pushing yourself hard and the rewards it will hopefully have."
Running tends to be a very lonely sport - often not a popular choice for teenagers looking to get active.
But Becky got into running when she was 13 and blames it on joining harriers at school.
"There were a lot of secondary school competitions like Secondary Schools' Cross Country and South Island Athletics, so there were a lot of events to train for."
Competing in one of the most demanding and mentally tough sports, Becky has to have nerves of steel on race days to try to block out any other thoughts or distractions. But she isn't without her quirky habits and routines.
"I like to take a sip of water right before the start of a race. Otherwise I think I will dehydrate - but it wouldn't really make a difference."
And before any big race, she likes to run the race in her head at least once before starting.
No judgements can be made on these quirks, as this sort of thing obviously seems to work for her.
Diet is another important part of Becky's lifestyle. She has to be careful she puts the right food into her body to fuel herself through her many training sessions and events. Routine is an easy way to ensure this.
"I like having porridge the morning of my race and a few lollies straight before and straight after my race and training."
Along with her coach, Jim Baird, with whom she has developed a strong relationship, her dad is a constant source of encouragement and fatherly wisdom.
She says his best piece of advice before she trains or races is to "have fun".
"This really helps me to relax and not take things so seriously."
Becky aims to be successful on the world stage at a senior level - something I'm sure will be no problem for her.
Not afraid of hard work, she pulls motivation from knowing there are people all around the world training hard.
This kind of maturity is impressive. Without a doubt, the St Hilda's community supports Becky and is constantly amazed by her efforts and we look forward to the next chapter of her running adventure
• Nita Sullivan. Year 13, St Hilda's Collegiate School
