“For a proud Kiwi who raves about Wellington (she says she finds New Zealand’s capital more culturally diverse than Boston), Ramsden’s life has been a fluid one, mainly thanks to her Kiwi father Mark’s career in foreign affairs for the New Zealand Government. She was born in New York, where her dad was working for New Zealand’s mission to the UN, spent four years in Wellington from the age of 3 to 7, then had stints, along with mum Margot and siblings Griffyn and Isla, in the Solomon Islands, Fiji and Ethiopia, before landing at Harvard where she was recruited as an athlete.”
^^From the posted article. It makes sense that should would identify as Kiwi if her parents are Kiwi and she has moved around her whole life.