[1] Marriner was born and raised in Rotorua, in the North Island of New Zealand.
[2] In May 2010, aged 18, she represented New Zealand at the World Agility Championships in Britain, winning a gold medal in the individual jumping event with a dog borrowed from a local owner.
[3] In 2018 she was selected for the Paw Blacks team to represent New Zealand at the Australian Agility Nationals in Melbourne, Australia.
[4] Marriner also performs with her team of dogs at public events in New Zealand, such as the National Agricultural Fieldays and A & P Shows.
In 2008 and 2012 she performed with her dogs on New Zealand's Got Talent, progressing to the grand final in 2008 and the semi-final in 2012.