"She got some soft sectionals in front and there wasn't anything really pressuring her," Walker said.
"She is a homebred off the farm and it is a real shame for Burgundy, who is not with us any more, as he has had such a good season.
"We've got a great team of young people at home and a win like this is very satisfying for them and everyone involved in this filly."
Te Akau principal David Ellis was on track at Awapuni to savour the success of the filly he co-bred with wife Karyn Fenton-Ellis and Walker.
"Mark came to work for me after leaving school and for him to win a Group 1 on his first day back training for Te Akau after 10 years in Singapore is just unbelievable. It's great to have him back," he said.
● Fancied New Zealand runners Regal Lion (10th) and White Noise (15th) finished well outside the money for Murray Baker and Andrew Forsman in the Australian Derby at Randwick in Sydney.
Hitotsu won a three-horse war at the end of 2400m as he defeated Benaud and Alegron after finding a last-gasp gap.
- NZ Racing Desk