Delphini(Harry Potter and the cursed child) is later discovered to be Bellatrix and Voldemort’s daughter. Born in malfoy manor, Delphini has been orphaned in the battle of Hogwarts. She tricked Scorpius and Albus into thinking that she was Cedric Diggory’s cousin and Amos diggory’s niece. But she did disappear in the book , so I think she saw what happened to harry when he was orphaned.