Dripping Black (Harry Potter)

An Obscurial is a young wizard or witch who developed a dark parasitical magical force, known as an Obscurus, as a result of their magic being suppressed through psychological or physical abuse.

Vela Carina is a young witch who developed a dark parasitical magical force, as she was abused when she was younger. By the time her new father saved her, she was already a danger to all.

After years of being scared of herself and magic, her father told her about the school of witchcraft and wizardry; Hogwarts. He introduces her to the order, which had her revealing herself pretty soon.

Vela is not only an Obscurial, she is a seer and belongs to the ancient house of black. It seems like her dear old uncle has found his family.