Jenny lost her way after her father was hauled to prison and committed suicide. She found herself falling into a downward spiral, unable to help herself. Her bravado hides a vulnerable, lost little girl who wants to be loved.
In her relationship with Luther, she is smart and sassy, and certainly hasn't lost her teenage petulance. They are like the odd couple with their different quirks and attitudes, who find a mutual understanding and affection. Jenny is Luther's Achilles heel. If he can save her, he can prove that there is love in the world.