Olivia Greene is a recurring character in Touch of Magic and mostly Once Upon a Blue Moon. She is the twin sister of Caleb Greene and the biological daughter of Mikeala Romano. She was legally adopted by Mila Romano and Liam Greene when she was 4 months old.
Olivia is human, but she is very much aware of magic because of her step-sister and her parents.
Olivia and her twin brother Caleb Greene were born in a woman's detention facility in Italy. She went into protective services, and when she was four months old she got adopted by her maternal aunt Mila Romano. When she was a little over 1 year old, Liam Greene signed up as her adoptive father.
For the next few years, Olivia was raised in her family's apartment along with her older sister Sophia Greene. When she was 5 years old she got another sister, Lilly Greene.
She started attending Sint-Joseph's Boarding School at the age of 7, where she excelled at the arts classes very quickly. At the age of 12 her parents told her about Magic and her sister's powers.