"Grandad passed away in 2014, so I thought I've got learn to shear."
She entered the Golden Shears in 2016 in his honour and was runner-up in the Novice woolhandling.
Now she's shearing at the 2018 championships as a tribute to her Nan and her battle to overcome her illness.
She she has taken the backstop approach of getting a career qualification behind her. On February 16, she qualified from a 36-week course with Wellington enterprise Cut Above Academy, as a barber.
Her great-grand parents worked in the shearing industry and her Nan and late grand-dad Hoani (Wonnie) Walker were shearing contractors in Wairarapa for more than 20 years, but Cheyenne's two older brothers both chose to go into the logging industry.
She's worked "on-and-off" in the woolsheds over the last six years, mainly for Waurarapa contractors Shear Expertise, but also spent a season working out of Cromwell in the South Island.
Asked before her appearance in the semifinal today what her ambition would be, she said: "Just to make my Nan proud."
"I am that," said her Nan. "I am very proud. Out of all my family she's the only one that's entered."
Her only advice to the mokopuna going into the semi-final was to mind those second-cuts. "If you have to leave them on," she said, "do. They can be pretty costly."
The semifinals and final are to be held this afternoon.