|Title||Deputy headmaster of Hogwarts School of Witchcraft and Wizardry; Head of Slytherin House; Professor; former Obliviator|
|Age||60 (D.O.B. February 19th, 1952); Year started at Hogwarts: 2000|
|Height||5 ft. 6 in.|
|Wand||Oak, Dragon heartstring, Eleven and a half inches|
|Affiliation(s)|| Hogwarts School of Witchcraft and Wizardry,
Slytherin house, Malfoy family
Professor Cassius Malfoy is the current deputy headmaster of Hogwarts School of Witchcraft and Wizardry. He is also the head of Slytherin house. He is the current professor of Potions and Alchemy.
He is a cousin of Lucius Malfoy, Draco Malfoy, and Scorpius Malfoy.
He owns an 11 1/2 inch oak wand with a dragon heartstring core.
Cassius Malfoy is a pure-blood wizard, born to a witch and a wizard. When he started attending Hogwarts, he was sorted into Slytherin house. Despite this, he was noted to be one of the most intelligent students in his year and many professors (and unbiased students) thought he would have made a fine Ravenclaw. However, due to his upbringing, he asked the Sorting Hat to put him in Slytherin, even though it was about to put him in Ravenclaw.