The woman accused of killing a schoolgirl and her father in an allegedly random arson attack has been identified as 24-year-old Kristen Leslie Olsen.

Baker Todd Mooney, 54, and his daughter Kirra, 10, perished after a fire tore through a large shed at their home on Fenwicks Road, Biggenden at about 12.20pm on December 20.

Olsen faced court today over their deaths but officers have still yet to establish any motive behind the attack and it is believed the duo were not known to her before their deaths.

The woman accused of killing Todd Mooney and his daughter Kirra in an allegedly random arson attack has been identified as 24-year-old Kristen Leslie Olsen.
The woman accused of killing Todd Mooney and his daughter Kirra in an allegedly random arson attack has been identified as 24-year-old Kristen Leslie Olsen. (9News)

The 24-year-old was charged with two counts of murder and one count of arson yesterday.

Olsen is a prolific social media user who describes herself as a “small-town barefoot gypsy”.

She recently returned to live in her hometown of Maryborough, which is located about an hour away from the Biggenden property.

Kristen Leslie Olsen appeared at the Maroochydore Magistrates court today via video link.
Kristen Leslie Olsen appeared at the Maroochydore Magistrates court today via video link. (Supplied)

Those who know Olsen say they’re in shock after hearing about the charges, describing her as a “happy hippy”.

Olsen appeared at the Maroochydore Magistrates court today via video link.

The matter was adjourned and she was remanded in custody.

When Olsen returns to court on Monday, it is expected she will face an additional charge of arson.

Baker Todd Mooney, 54, and his daughter Kirra, 10, perished after a fire tore through a large shed at their home on Fenwicks Road, Biggenden.
Baker Todd Mooney, 54, and his daughter Kirra, 10, perished after a fire tore through a large shed at their home on Fenwicks Road, Biggenden. (9News)

Police had been searching for her white Holden Barina wagon, which was later found burnt out alongside a trailer and caravan.

Police allege it was set alight on the same day as the fatal Biggenden blaze.

Officers encourage anyone who may have seen the car on December 20 to contact them as they continue to piece together the events that led to the deaths.

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