Lucius Malfoy is a Death Eater, head of a wealthy pure-blood wizarding family and a psychopath. He lives with his wife Narcissa Malfoy (née Black) and their son Draco at the Malfoy Manor in Wiltshire. Lucius was a school governor of Hogwarts before being sacked, and has very close connections at the Ministry of Magic. To maintain his reputation and influence, he makes donations to the Ministry, to charity, and to St Mungo's Hospital. He was educated at Hogwarts, where he was a prefect in Slytherin House.


He debuts as the main antagonist in Harry Potter and the Chamber of Secrets, in which just before Draco and Harry's second year at Hogwarts, Lucius plants Tom Riddle's diary in Ginny Weasley's potions cauldron while she is shopping for school supplies at Flourish & Blotts, in a plot to use her to reopen the Chamber of Secrets, which would lead to attacks on Muggle-born students.



Lucius knows the diary is cleverly enchanted, but is not aware that it is a horcrux containing a part of Voldemort's soul. He is careless with it and punished by Voldemort himself. Lucius intends to use the opening of the Chamber of Secrets by Ginny to discredit her father, Arthur Weasley, and Dumbledore. Lucius' plans are ultimately thwarted with the help of the Malfoys' house-elf Dobby, and Harry, but not before the Chamber is opened and Lucius uses the ensuing terror (and threats to attack their families) to influence the school's Board of Governors to discredit and dismiss Dumbledore as Headmaster.



Subsequently, Harry tricks Lucius into setting Dobby free. Upon this, Lucius attempts to attack Harry with his wand but Dobby disarms him before he can do any harm. Lucius is ultimately stripped of his title as a Hogwarts school governor. Despite his sacking, he still maintains strong ties with the Ministry of Magic.



Lucius next appears in the beginning of Harry Potter and the Goblet of Fire during the Quidditch World Cup, sharing prime seats in the Top Box with Minister for Magic Cornelius Fudge. Later in that book, when Voldemort rises again and summons his Death Eaters, Malfoy rejoins him and asserts that he had done everything he could to help his master, who however remains unimpressed. Harry reports Malfoy's declarations to Minister Fudge, who refuses to believe him. Thus, the wealthy Malfoy continues to maintain strong ties with the Ministry.



During the climax of Harry Potter and the Order of the Phoenix, Malfoy is the leader of the Death Eaters who are sent to retrieve the prophecy from Harry in the Hall of Prophecy. Lucius tries several ways to get the prophecy from Harry without breaking it, but the boy and his friends manage to escape from the Hall. Malfoy finally meets him in the Death Chamber, where Harry is about to give it to Malfoy when the Order of the Phoenix breaks into the Ministry and begins to duel with the Death Eaters. Dumbledore himself arrives at the end of the battle and Malfoy is captured and sent to Azkaban.



By the final book, Voldemort has given Malfoy his freedom, though he looks significantly the worse for wear, having lost Voldemort's favour. Voldemort treats him with great contempt by hijacking his house for Headquarters, and is forcing his son to do dark deeds against his nature, sparking sympathy for the notorious family for the first time in the series. Voldemort borrows Lucius' wand which is accidentally destroyed by Harry Potter. Later in the book, Lucius, along with his wife and sister-in-law, accidentally allow Harry and his friends to escape from Malfoy Manor. Voldemort punishes them severely, eventually putting them under house arrest.



Despite his long-standing position as a Death Eater and Voldemort's advocate of pure-blood supremacy, Lucius decides his love for his family is more important than his involvement in the war. During the Battle of Hogwarts, he pleads with Voldemort to let him onto the battlefield to locate his son. He and the rest of his family are reunited at the end of the book. Following Voldemort's death, Lucius, Narcissa, and Draco all manage to "weasel their way out" of being sent to Azkaban due to Narcissa's aiding Harry in the Forbidden Forest.



Lucius's ultimate fate after Deathly Hallows is unknown, but actor Jason Isaacs stated in an interview with Syfy Wire that he believes Lucius would not feel like a member of wizarding society again after Voldemort's fall, as society would shun him. Isaacs also states that Lucius would become a shell of his former self, lose the respect of his wife and son, protect himself with his money, and drink himself into an early death.



According to Forbes magazine, in 2006, Lucius Malfoy was number 12 on their Forbes Fictional 15 list.



In the film series, Lucius is portrayed by Jason Isaacs as an adult. Scenes with Tony Coburn as a teenage Lucius were cut from the final movie.



IGN listed Lucius as their fifteenth top Harry Potter character, praising Jason Isaacs' portrayal of him.