The dying daughter of Starfleet officer Thomas Harewood in Star Trek Into Darkness, whose cure with Khan's blood is the price of her father bombing the Kelvin Memorial Archive in London.
Lucille Harewood is the young daughter of Thomas and Rima Harewood. At the start of Star Trek Into Darkness, in 2259, she lies unconscious in the Royal Children's Hospital in London with an illness the doctors cannot treat. Her name and her mother's come from the credits.
Outside the hospital a stranger calling himself John Harrison tells her father that he can save her. He supplies a vial of his own blood, which Harewood adds to her drip, and her readings begin to recover at once.
In return Harewood destroys the Kelvin Memorial Archive, a secret Section 31 facility, killing himself and many others. The same regenerative blood is later used by McCoy to bring Kirk back from death.