Jenny Monroe

Origin  

Jenny Monroe and her twin brother Malcolm were the offspring of Flashback, a Canadian criminal with the mutant ability to control duplicates of himself pulled from alternate futures. Both she and Malcolm also developed the ability to create and control temporal duplicates of themselves. However, their relationship with their biological father was a strained one. Jenny was not particularly fond of her criminal father. With liberal use of her and her brother's temporal duplicates, Jenny set up a comfortable lifestyle for herself with Malcolm in a secluded mansion in Alberta, Canada. 

Creation  

Jenny Monroe was created by Jonathan Hickman in Secret Warriors. The character was first mentioned by name and description in the backmatter of the first issue but did not actually appear until much later in the series. When she appeared in issue #24, she was illustrated by artist David Marquez. 

Major Story Arcs  

Wheels Within Wheels  

Unknown to Jenny or her brother, they were both on NIck Fury's Caterpillar list, a secret record of superhumans who had not yet been discovered and recruited by other parties. One day, Mikel Fury showed up with Carlos Ayala to recruited the twins for his Secret Warriors team. They immediately refused. Jenny had a life of luxury and saw no reason to leave it. However, Mikel revealed that her life of luxury was secretly being supported by her brother's criminal activities and that was a matter he could sort out for them. Surprised by her brother's secret, Jenny reluctantly agreed for the both of them.  
    

Jenny became a member of the Secret Warriors' Team Gray, led by Mikel Fury. Along with the rest of that team, she was tasked with surveillance and other intelligence gathering on the reclusive organization called Leviathan. It was a largely uneventful assignment. Leviathan had seemingly gone dark for decades, leaving Team Gray with very little activity to go after. This changed when Magadan succeeded in awakening Leviathan's leader, Orion. It was not long after that Leviathan activity spiked and a war began with HYDRA. Team Gray's job became busier. 
 
In the months that followed, Nick Fury's secret war that pitted the Secret Warriors between Leviathan and HYDRA heated up. Losses were heavy on all sides, and a civil war had broken out inside of HYDRA. Team Gray was sent in to take out the Hive's HYDRA stronghold. The mission went bad and the entire team, including Jenny, lost their lives while completing the mission objective. 

Powers and Abilities  

Jenny Monroe has the ability to produce temporal duplicates of herself that obey her wishes. This ability seems to be identical to her father's, but it has not been fully explored. The fact that Jenny and her brother have gone seemingly unnoticed by the X-Men draws into question whether this is actually a mutant ability. 
 
As a member of the Secret Warriors, Jenny has presumably undergone intensive training in combat and espionage skills.