The body of the Minnesota native was found in Las Vegas Sunday night, on January 7. LA Direct Models said in a press release that the cause of death was "unknown."
"While only represented by Direct Models for a short period of time, we came to know Olivia as a beautiful girl with a very sweet and gentle personality," the statement read.
"She was a great person," a friend from Minnesota told Radar Online. "We're missing her. Everyone is in shock. We're trying to piece this together."
In December, she tweeted that she was alone during the holidays and needed fans to "lift her spirits."
Her time in the industry was brief. She made her debut in March and was featured in productions by Vixen, Naughty America, FTV Girls, New Sensations, Brazzers, Digital Sin and Girlfriends Films.
Nova is the fourth porn star to recently and unexpectedly pass away. August Ames committed suicide on December 6 at age 23 after enduring cyber harassment, Yuri Luv died on December 13 from a drug overdose at age 31 and Shyla Stylez died in November from unknown causes at 35.
The adult entertainment industry is now under pressure to provide better mental health resources.
LA Direct Models added, "Another one, way too young we are beyond shocked and most certainly, completely out of the blue. Rest in peace, sweet angel."