[2] Ja'mie is a student in Year 11 at Hillford Girls' Grammar School—a fictional private school on Sydney's affluent North Shore—who is highly driven, charismatic, and accomplished but also narcissistic, neurotic, manipulative, and callous.

[2] King was first introduced in We Can Be Heroes as a 16-year-old student in Sydney who attends Hillford Girls' Grammar and is one of several nominees for the Australian of the Year Award.

Despite her self-proclaimed altruism, her motives are not due to concern for the children's welfare; Ja'mie is shown as seeing it as a way of gaining approval and fame, as well as a chance to legitimately go on crash diets in the form of the 40 Hour Famine fundraising event every week.

Two weeks before the Australian of the Year finals, Ja'mie is informed that a flood has hit "her" village, killing all but two of her sponsored children.

Ja'mie is sceptical at first but soon realises that this visit will bring her a lot of media attention, so she invites one of her friends along because she "is good at taking photos".

However, the relationship only lasts a short amount of time as Ja'mie steals Sebastian's mobile phone and finds out a girl called Madeline has been texting him to sit with him in English class.

[6][7] Ja'mie and all of her prefect friends are eventually expelled from Hillford Grammar, resulting in them not obtaining their Higher School Certificates.