Jane Shore appears as a fictionalized interpretation of the historical figure within this adaptation. Her background establishes her as a mistress to Edward IV who leverages her court position for influence, later becoming involved with William Hastings after Edward's death.

She is explicitly portrayed as a witch employing magic and manipulation. Her witchcraft connects thematically to Joan of Arc, forging a symbolic link perceived as threatening by Richard III due to their shared association with feminine power and his discomfort with his intersex biology.

Actively engaging in court intrigue, often as an antagonist, she manipulates key figures. This includes Edward IV during his decline into debauchery and George, Duke of Clarence, fueling his resentment. She specifically targets Richard III, exploiting his psychological vulnerabilities and internal conflicts regarding his body and identity.

Her methods involve psychological warfare, preying on Richard's deep-seated fears instilled by his mother, Cecily Neville, who condemned him as demonic. Jane Shore reinforces this internalized demonization to unsettle and control him.

Following Edward IV's death, she transfers her affections and manipulations to William Hastings, Lord Chamberlain. Accused of conspiring against Richard, Duke of Gloucester, during his Protectorship by facilitating communication between Hastings and the queen dowager Elizabeth Woodville in sanctuary, this leads to her arrest and punishment under Richard's orders after he becomes king.

Her narrative function extends beyond simple antagonism. She embodies the perceived dangers of femininity and unchecked power within the court, serving as a dark mirror to Richard's struggles. Her presence highlights the pervasive atmosphere of suspicion and the political use of accusations like witchcraft. Information regarding her ultimate fate within the adaptation's continuity remains unclear.