Natasha was first known to Summer Bay as a mystery girl, "Jane Doe". She was found on the beach, unable to speak and appeared to be in a state of shock.
It is revealed that Natasha had an unorthodox upbringing: she was the daughter of survivalist parents who had dropped out of society, preparing for Y2K. They lived in a fortress camp in the bush, and when her parents died trying to arm their camp, Tasha was traumatised and fled. She was later found on the beach of Summer Bay.
Irene won Tasha’s trust and took her into the Beach House as a foster-child. Flynn became Tash’s legal guardian and Tash spends some time living with Sally and Flynn and then returns to live with Irene. She quite quickly feels at home in Summer Bay.
The truth of Tasha’s real parents is revealed. She is the daughter of a wealthy man who had an adulterous relationship with Angela Russell. To avoid scandal at the time, he had paid Angie a considerable amount of money to go away. She did go away and put her baby up for adoption.
However, Angie did one good thing for her daughter. She made a provision for her Tasha and put $30,000 aside for her. With a letter to Tasha to be opened when she reached the age of eighteen the cash and letter were put in a box and given to her adoptive parents.
Tasha often worried that perhaps she carried the "bad seed" that was in her mother, but she desperately wanted to find her. She is shattered when she learns that her mother was accidentally killed by her son Dylan (Tasha’s half-brother).
Tasha sees her mother in a dream, who tells her about the letter and where the box is hidden. She retuns to the camp and finds the box with the cash and the letter from her mother.
The letter reveals Tasha’s father is Ian Osborne. She contacts him, but he decides to cut all ties with her. Her mother’s cousin, Josie Russell buys the Caravan Park for her, which she later sells to the Macklin Corporation.
Tasha is a free spirit and feels perfectly at home with nature. She sees the good in everyone and reacts very strongly if there is a sense of betrayal in people. She and Robbie are similar free spirits ...
When Robbie and Tasha fall in love, she composes a commitment ceremony of marriage between Robbie and herself. In a beautiful scenic spot in the bush, bedecked with flowers and surrounded by nature, the young couple pledge their love and loyalty to each other. Needless to say, Beth is shocked to hear of their 'marriage', but has now come to terms with the fact they are committed to each other and are living together.
When Tasha becomes involved with a cult called The Believers, she tries to induce Robbie to join too. He refuses and when she decides to live with The Believers at The Farm, Robbie is broken-hearted. He can't believe it when Tasha tells him 'it's over'.
Tasha is unaware that Jonah, the son of Mumma Rose of The Believers has drugged and raped her...Tasha is seen as The Chosen One for the next leader of The Believers. When it's finally revealed that The Believers are guilty of kidnapping and even murder, Tasha realises her mistake and returns to Summer Bay. Robbie and Tasha are reconciled and they have a surprise, romantic wedding which Robbie organises. However, Tasha soon learns she is pregnant and the awful realisation is that Jonah is the father of her baby, not Robbie!
When Tasha admits to the police that she shot Josh West, Robbie goes to the police station and confesses he is the culprit, so that the pregnant Tasha does not have to go to prison. Fortunately Barry Hyde is revealed to be the real murderer.
Tasha suffers more complications with her pregnancy, including going into premature labour as a result of the stress of Robbie missing in the bush after a tragic chopper crash. During his absense Tasha and Jack form a co-dependant bond, which relaxes into strong relationship after their respective partners return home.
Tasha faces further trauma when cult leader Mumma Rose returns for Tasha's baby, kidnapping Tasha and Martha while they are staying alone in the bush.
