The protagonist's full name is Heking Cygnus Malfoy.
"You think Slytherin is only about bloodline?" Heking Malfoy sneered, her wand tip pressed against Draco's throat. "Power is taken, brother."
Draco Malfoy's never-before-acknowledged twin sister, Heking, enters Hogwarts carrying a forbidden book and a body full of secrets. She despises Draco for being a coward, yet repairs his Vanishing Cabinet in the dead of night. She mocks Hermione as a "Mudblood," yet secretly corrects her Potions essay in the library. When everyone cries out "The Chosen One," she alone sees the fragments of a soul writhing inside Harry's scar.
"Whose side are you on, really?" On the eve of the final battle, Hermione grabbed her silver-and-green tie and demanded an answer.
Heking stroked the wrist burned by the Cruciatus Curse and smiled. "Of course, I'm on my own side."
Until that night, when she took a Killing Curse meant for the dying Draco, and a silver snake Patronus illuminated the Black Lake alongside a phoenix.
"I thought... you hated me most of all?" Draco gasped in a pool of blood.
