"I'm very proud. The work I put into it took a lot of patience and time."
She says the name of her creation is inspired by her favourite book series "Warrior Cats" by Erin Hunter.
Kassie could pick from four of the design briefs: myths, legends and fantastic beasts, stories of the South Pacific, larger than life or city of the future, or she could enter the open brief.
"I changed from open brief to myths, legends and fantastic beasts."
She says she can not count the hours she worked on her design.
"It was months and months' worth of work. I would work on it whenever I had free time and spent most of the school holidays working on it leading up to the competition."
To create the base of the head and feet, she used foam that she carved into the right shape.
"It was a lot of trial and error finding the right foam. I recycled an old mattress layer for that and I had the other materials saved up for a while."
To create the custom patterns for the design, Kassie created a duct tape dummy.
She says she hand-sewed sow the patterns for the head, tail and feet.
"The tail itself had 50 individual pieces sewn together."
This wasn't Kassie's first time entering the competition.
"I first entered in primary school to get a feel of the competition."
Kassie says professionally photographs were taken of her creation and these will be used in judging for the nationals.
"I'm so excited to see what will happen at nationals."