She is a junior detective at Agatha Raisin's agency, where her photographic memory makes her a key asset.
She is portrayed by Jodie Tyack.
Never lasting more than three weeks in a job, Toni had previously worked in debt collection and in rent collection for the council. (The Haunted House)
Toni took over from her cousin, Gemma Simpson, as Agatha Raisin's cleaner despite being unsuited for the job. After demonstrating her photographic memory, Agatha invited Toni to work for her at the detective agency. Toni was particularly useful for going undercover. (The Haunted House)