Delphini

Delphini aka Delphi or Delphini Diggory was the main villain of Harry Potter and the Cursed Child. She was a half-blood witch, the daughter of Tom Marvolo Riddle and Bellatrix Lestrange. Delphi was the heir of Slytherin and had Slytherin traits, such as Parseltongue. She was born in a liaison between Lord Voldemort and Bellatrix Lestrange. In the Battle of Hogwarts, her parents died. Her stepfather Rodolphus Lestrange survived, but was sent to Azkaban, the wizard prison. Euphemia Rowle adopted her, because only of gold. After some time, Rodolphus escaped or was released and told Delphini about saving Lord Voldemort. Delphi found Amos Diggory, and Confunded him, claiming to be his niece. Delphi confronts Albus Potter and Scorpius Malfoy and destroys their wands, leaving them trapped in time. She was later defeated by the Ministry of Magic and imprisoned in Azkaban.

Battle v.s. Luke Skywalker (Legends) (by Spinosaurus75DinosaurFan
See User blog:Spinosaurus75DinosaurFan/Delphini vs Luke Skywalker.