Personal Info:
Real Name: Charise Carnes
Also Known As: Daybreak
Place Of Birth: Unknown
First Appearance: Batgirl Vol.4 #10 (2012) Modern Age Villain
Known Associates: Katharsis, James Gordon, Jr., Gretel, Bleak Michael, Bonebreaker, Mirror, Grotesque
Group Affiliation: The Disgraced
Base Of Operations: Gotham City
Grudges: Batgirl
Creators: Gail Simone and Alitha Martinez
Knightfall is masterfully devious tactician, able to easily go from her facade of a vulnerable young girl to her true, ruthless self. She has a vast network of lawyers, judges, and other officials at her beck and call - due to anything ranging from blackmail to bribery. Her family's fortune gives her a great amount of capital for her endeavours, a fortune she maintains through business deals and charity events. She is also a formidable combatant with the two knives she wields that were used to slaughter her family.
Weapons: Knightfall wields two knives.
Charise Carnes and her younger brother Emil were born to William and Virginia Carnes, a rich and prestigious family in Gotham City thanks to her father's real estate dealings. He'd bought a large landfill on the bayfront of Gotham and enacted the state's biggest land reclamation right on top of it. William Carnes was no saint though, building his riches with muscle, bribes, and countless judges in his pocket. Charise was aware of her father's corrupt practices, but idolized him all the same. She never thought another man could come close to the admiration she felt for her father, until she met Trevor. He was a kind boy who was the first one she met that didn't seem to care about her family's riches. He certainly didn't, as one night he came to her house with knives and made Charise bind her parents and little brother up with duct tape, after which he took three hours to cut them to pieces "for the lulz", all while Charise was forced to watch.
Afterwards, reportedly no evidence was found that someone else had committed the slaughter, and so Charise was left as the only suspect. She was found guilty and sent to Arkham Asylum at age 18 due to prison overcrowding. Then there was a massive breakout at Arkham where some of the sickest murderers in the country took guards hostage and "played" with them. Charise survived, but had been forced to watch this brutality for two straight days. This was all what Charise had wanted however. After Trevor had killed her family, she'd realized that there were crimes that prison simply wasn't severe enough for as punishment. She'd hidden the truth of the massacre in order to get sent to Arkham, in order to learn "the craft of madness." She learned everything she could've wanted, especially under the tutelage of James Gordon Jr. while she was in Arkham.
Now reshaped as she saw fit, Charise used every one of her father's underhanded methods to get herself released from Arkham. She then set to work on saving Gotham from the madness and crime that had permeated it as Knightfall. As Charise Carnes, she would use her family's money to change Gotham for the better with community service programs and urban redevelopment; and as Knightfall, wielding the knives Trevor had used on her family, she and her Disgraced would use whatever means necessary to apprehend, torment, and kill all criminals. She would rule Gotham, and fix what civilization couldn't.
Knightfall at DC Database
Knightfall at Comic Vine