The sole survivor of a massacre perpetrated by the mass murderer Bloody Mary, Elodie managed to protect herself by activating her ubergene ability. Rather than kill the girl, Mary found the resistance in the girl reminded her of her own youth. She levelled with Elodie and offered her a chance at life that she would not have had living in squalor as she had been. Elodie struck out at Mary but was beaten and rendered unconscious.

When she awoke, Mary had taken her to a safe house and nursed her back to health.

Elodie had never experienced tenderness like that before, having endured a string of abusive foster families and government care. Mary's offer seemed to offer her a new chance at something she had felt was lost to her. Elodie accepted, but on the condition that Mary never lie to her. Mary greed.

While Elodie is training to use her abilities, she has been kept safely hidden at a boarding school on the West Coast. Elodie is less than happy with the situation and escapes frequently to render her own brand of 'Bloody Mary' mayhem, but she always makes it back to the school before anyone has a clue as to her absence.

Elodie has had a hard life, and now she has power to level the playing field. She takes a delight in hurting those who she believes are arrogant and powerful, whether it be a school age bully or a corporate executive. She hates rules and disregards them outright, preferring to live her life the way she wants. This has caused some tension at the school but Mary has paid them enough to overlook the occasional rebellion (or mutilated corpse).

"Carrie was a wimp."

Black Betty is a powerful telekinetic, although she has not mastered the ability and frequently burns herself out. At her peak she is able to lift 50 tons, but is just as adept at manipulating smaller weights. She is able to fly, project deadly bolts of telekinetic force, erect almost impenetrable shields and level areas with her self-titled "telekinetic tantrums".

When she ventures out as Black Betty, Elodie wears a grey armoured bodyglove with black gloves, boots and bands around her upper arms. She has a blood red exclamation mark on her chest and wears red shades to hide her identity. When she attends her exclusive school, Elodie is forced to wear the uniform, although she rebels by altering the dress code as best she can.