Kelly Hayden, also known as Grace Kelly, is a villain and enemy of Batman. She is a delusional sociopath who believes she is the reincarnation of Grace Kelly. She acts like a typical 1950s woman, and dresses accordingly. She is a dark person, often torturous, who often attacks historians and genetic doctors who disprove her theories.
Batman: The Institution
She will appear in the upcoming game Batman: The Institution as an antagonist in a side mission.