Personal Info:
Real Name: Lisly Bonner
Also Known As: No known Alias
Place Of Birth: Unknown
First Appearance: Batgirl Vol.4 #5 (2012) Modern Age Villain
Known Associates: Knightfall, James Gordon, Jr., Bonebreaker, Katharsis, Bleak Michael, Mirror, Grotesque
Group Affiliation: None
Base Of Operations: Gotham City
Grudges: Batgirl and Batman
Creators: Gail Simone, Ardian Syaf and Vicente Cifuentes
Mind Control: Gretel has the power of hypnotic suggestion over men using the trigger phrase 338, representing the 3 bullets of a .38 calibre handgun.
Pain Resistance Gretel is unable to feel physical pain.
Weaponry: Gretel is proficient in the use of knives and other firearms.
Lisly Bonner was an up-an-coming investigative reporter for the Gotham Flame. She infiltrated the Whittaker family mob to expose corruption in the city. Unfortunately, when a recording device was found on her person, Boss Whittaker shot her three times with a .38 calibre weapon, twice in the stomach and once in the head.
Despite these wounds, Lisly managed to survive. She awoke in a hospital, discovering that she had power over the minds of men. She decided to use that power to gain revenge on the Whittakers. She adopted the name Gretel, and began killing the entire Whittaker family, despite interference on Batgirl's part.
Gretel at Batman Wiki
Gretel at DC Database
Gretel at Comic Vine