Delphi Diggory, also known as Delphi, is the titular main antagonist of the play Harry Potter and the Cursed Child. She is the daughter of Lord Voldemort and Bellatrix Lestrange, and is the only living heir of the Dark Lord.
Delphi first appears in the play as the niece of Amos Diggory, who is seeking help from Harry Potter to locate his missing son, Cedric. Delphi claims to be Cedric’s cousin, and is determined to help find him. However, it is soon revealed that Delphi is actually Lord Voldemort’s daughter, and her true purpose is to restore her father’s power.
Delphi has a strong connection to the dark arts, and is able to manipulate people and objects with her magic. She is able to use the Time-Turner to travel back in time and change the events of the past. She also has the ability to possess people, and uses this power to manipulate Albus Potter and Scorpius Malfoy in her quest to restore her father.
Delphi is a dangerous and powerful witch, and is willing to do whatever it takes to achieve her goal. She is cunning and manipulative, and is not afraid to use her powers to get what she wants.
Delphi is a complex character, and her motivations are never fully revealed. She is a tragic figure, driven by her desire to restore her father’s power, and her actions are often motivated by her own pain and suffering.
Ultimately, Delphi is defeated by Harry Potter and his allies, and her plans to restore her father are thwarted. However, her story is a reminder of the power of love and friendship, and how it can be used to overcome even the darkest of forces.