She is believed to have first met the men at a local nightclub and joined them at their hotel.
The Perth woman, who was known to her friends as “Tash”, had become a soldier in the Australian Army just four months before her tragic death.
“I’ll never forget your sweet smile, my beautiful sister. I love you, Natasha,” her older sister Alannah posted on Instagram, news.com.au reports.
On Facebook, sister Bryanna posted: “Natasha Rowley, gone but never forgotten, I love you sister.”
Ms Rowley’s death is not being treated suspicious and police are yet to confirm how she died.