Cassandra Vablatsky was a celebrated Seer and the author of Unfogging the Future, the primary textbook used for the subject of Divination at Hogwarts School of Witchcraft and Wizardry. Although she does not appear directly in the narrative, her work is a cornerstone of the Divination curriculum studied by Harry Potter and his classmates, representing the established, academic side of fortune-telling within the wizarding world.
Little is known about the life of Cassandra Vablatsky from the original novels. She was a renowned Seer who lived to an advanced age. During her life, she authored Unfogging the Future, a comprehensive guide to various methods of divination which became a standard text at Hogwarts. According to her Famous Witches and Wizards Cards, Vablatsky lived from 1894 to 1997. (video game)
There is no canonical description of Cassandra Vablatsky's physical appearance or personality.
No personal relationships involving Cassandra Vablatsky are documented. Her primary connection to the story is through her work, which was studied by generations of Hogwarts students, including Harry Potter, Ron Weasley, and Hermione Granger. While Professor Trelawney relied on Vablatsky's book for her curriculum, students like Hermione Granger were highly skeptical of its teachings and the validity of the subject as a whole.