Sapphire Stagg - Beware the Batman (2013)

The daughter of Simon Stagg, Sapphire Stagg fell in love with a security guard working at Stagg Industries, unaware of her father’s utter revulsion at the idea of her potentially marrying below her status as a Gotham socialite and heiress to his empire. She loved Rex and would reassure him that she would love him no matter what, wanting to reveal their relationship to Simon.

One evening, she was caught on security footage by her father kissing Mason, which angered Simon so much that he manipulated events to create a lab accident that would kill her partner. She went with him to the hospital, where she would happily thank her father for seemingly approving the proposal.
Leaving momentarily, she would be knocked down by the door as Mason’s body was physically altered by the experimental chemicals of Project: Metamorpho he had been exposed. She was quickly able to realise it was him, however, before she could talk to him Mason was shot at by a police officer and forced to flee.

Going back to her apartment, she fell asleep, where Mason would eventually reveal the extent of the damage to her. She would dismiss Batman’s accusations of her father’s involvement as slander, trying to break up the fight between Mason and the Dark Knight, only to be knocked unconscious by an electrical discharge that was being generated to subdue Rex. In his mission to protect her, Mason fled with her into the sewers, where she was kept warm by his powers.

She was taken to Stagg Industries in his mission for revenge against Simon, coming to as Batman and her father exposed him to more of the chemicals, hoping that with a few alterations they would form an antidote. Realising that he could not revert back to his original form, she told Rex that she could not love him, watching with despair as he turned himself into vapour and went up a ventilation duct.
Sapphire angrily berated Batman, rushing to her father’s side to support him from Batman’s continued statements that he was responsible for the “accident”, only to see the incriminating security footage that had been forwarded to the G.C.P.D. She ran off crying, furious and heartbroken at Stagg’s betrayal.

Sometime later, she moved into a new apartment block overlooking an Old Gotham abandoned church, unaware that her ex-fiancée was still alive and still wanting to protect her from harm. However, following in the footsteps of her father and taking over the family company, she hired men to terrorise Old Gotham and run people out, hoping to procure cheap property to renovate and profit from. She provided them with battle suits and weapons but was constantly foiled by “The Golem of Old Gotham”.

Sapphire was challenged by Batman after her latest defeat, mockingly asking him to prove her involvement with the operation. She went on to muse that she was proving her father wrong and was just as good at “business” as he was. Declaring that she was not through, she quickly changed tract, wishing to know if the Golem was in fact, Rex. However, she was shot down by Batman, who told her that if she continued down this path she would guarantee that she would join Simon in prison.