Regulus Black
is the younger brother of Sirius Black. According toHarry Potter and the Order of the Phoenix, he died "some fifteen years previously" as seen from the perspective of August 1995. As it is common in the Black family, Regulus is named after a bright star, in this case the brightest star in the constellation Leo. Before publication of the final volume of the series, Rowling stated that Regulus was dead, but did not comment on the nature of his demise. She also remarked in an interview: "Regulus got in a little too deep. Like Draco. He was attracted to it, but the reality of what it meant was way too much to handle." Sirius described him as his parents' favourite son because he accepted their ideas about blood purity. Regulus is sorted into the Slytherin House and played Seeker on its Quidditch team. He joins the Death Eaters at the age of sixteen but later has a change of heart.
The Blacks' house-elf, Kreacher, reveals to Harry and his friends in Harry Potter and the Deathly Hallows that he was ordered by Regulus to assist Voldemort in hiding a locket. Kreacher was forced to drink the potion protecting the locket to test its effectiveness. The potion (the same one that Dumbledore drank in that same cave) causes horrible memories or thoughts to be relived, intense stomach pain and dehydration. Kreacher was forced to go to the Inferi-infested water and drink and was saved only by the fact that house-elf Apparition works differently from wizard Apparition. When Kreacher tells Regulus what has transpired, Regulus forces the elf to take him to the cave. While there, Regulus, instead of forcing Kreacher to drink, drinks the entire potion himself and switches the locket for a fake one. Before being dragged underwater and killed by Inferi, Regulus tells Kreacher to destroy the original locket. Regulus deduced that the locket was a Horcrux due to Voldemort's dropping various hints about having made them, in his arrogance believing that nobody would hunt them down and destroy them. Many years after his sacrifice, Kreacher revealed that he was still loyal to Regulus' memory, even leading the House-Elves of Hogwarts in the Battle of Hogwarts in Regulus' name.
Regulus appears in a photograph owned by Horace Slughorn in the film adaptation of Harry Potter and the Half-Blood Prince, played by Thomas Moorcroft.
Alecto and Amycus Carrow
and are siblings who participate in the assault on Hogwarts at the end of Harry Potter and the Half-Blood Prince. Amycus is described as being squat and lumpy, with a lopsided leer and a wheezy giggle; Alecto is described as a "stocky little woman" and shares her brother's squatness and laugh. It is said that after Voldemort's first downfall, they believed that he was gone forever.
In Harry Potter and the Deathly Hallows, Alecto and Amycus become "teachers" at Hogwarts, severely disciplining students who oppose Voldemort. Amycus teaches Defence Against the Dark Arts, but as Neville Longbottom puts it, it becomes just "The Dark Arts" in which students are forced to perform theCruciatus Curse against students who have been assigned to detention. Alecto teaches Muggle Studies, which becomes a compulsory subject, and teaches students that Muggles are like animals. Right before the Battle of Hogwarts, Alecto waits in Ravenclaw Tower on Voldemort's orders, preparing to capture Harry, but is stunned by Luna Lovegood after touching her Dark Mark to summon Voldemort. Amycus, after seeing what happened, tries to conspire with Minerva McGonagall who helped him into the room to offer some Ravenclaw students as sacrifices to Voldemort while planning to use the lie that Ravenclaws had ambushed Alecto and forced her to press her Dark Mark. McGonagall refuses and argues with Amycus, who spits in her face. Enraged at this, Harry casts the Cruciatus Curse, with such power that Amycus passes out. Later, McGonagall places the Imperius Curse on him, then binds him with his sister and places him inside a net.
Ralph Ineson plays Amycus, and Suzie Toase appears as Alecto.
Barty Crouch, Jr
was captured with the Lestranges, who tortured Frank and Alice Longbottom, parents of Neville Longbottom, into insanity. His father, Barty Crouch, Sr., who headed the Department of Magical Law Enforcement at the time, sentenced him to life imprisonment in Azkaban. However, he later rescues his son as a favour to his dying wife. When they visit him in Azkaban, Mrs. Crouch used Polyjuice Potion to switch appearances with her son, enabling him to escape while she remains in his place. When she dies, she is buried under his identity. Crouch Jr. is nursed back to health by Winky, the family's house-elf.
