Personal Info:
Real Name: Unknown
Also Known As: No known Alias
Place Of Birth: Unknown
First Appearance: Batgirl Vol.2 #1 (2008) Modern Age Villain
Known Associates: David Cain
Group Affiliation: None
Base Of Operations: Gotham City
Grudges: Batgirl
Creators: Adam Beechen and Jim Calafiore
Marque has no super human powers, however she been trained and raised by one of the world’s greatest Assassins, her father David Cain. She is a highly advanced Martial artist, assassin and is an expert in the use of knives.
David Cain's second daughter, sister of Batgirl Cassandra Cain. The identity of Marque's mother has not been revealed, though it is possibly Lady Shiva.
Like Cassandra, Marque was considered more of an experiment than a daughter by Cain, another of his attempts to create the ultimate warrior. She was raised among the League of Assassins and trained intensively in martial arts and assassination techniques. Given her current communication ability, it is likely that she was not raised without speech as Cassandra was. Marque understood early on that she was nothing but a tool to her father and would never have his love. Fueled by resentment, she planned to use Cain's teachings to one day destroy him.
After running away, Marque devoted herself to her father's downfall. He eluded her for many years but eventually, her search led her to her sister Cassandra (Batgirl).
Marque at DC Database
Marque at Batman Wiki
Marque at Comic Vine