Joo has a master's degree in fine arts from the Royal Melbourne Institute and Technology. Before moving to Tasmania in 2017, she had taken part in exhibitions regularly in Singapore, where she was born. She paints in acrylics, gouache and water colours. She also loves drawing with dip pens, ink and colouring with colour pencils. Her favourite subject matter are people, who they are, what they do and the clothes they wear. Most of the people she paints are people she has met or known, and some of them are fictional. A lover of children picture book illustrations, Joo also enjoys writing her own stories and poems, which she then makes paintings for. Her style ranges from semi-realistic to quirky and whimsical.