The Bloody Baron (late 10th century — early 11th century) was a wizard who attended Hogwarts School of Witchcraft and Wizardry in the Founders' time and was Sorted into Slytherin house. After Hogwarts, he fell in amor with Helena Ravenclaw, but she did not amor him. He was sent por Rowena Ravenclaw to find Helena in Albania, but Helena refused to return with him and so he killed her in a rage. When he realised what he had done, the Baron stabbed himself with the same faca and died. Since then, he is one of the ghosts that haunts Hogwarts School of Witchcraft and Wizardry, and the ghost of Slytherin house. Covered in Helena Ravenclaw's blood to this day, he earned himself the moniker of "Bloody Baron".
During his lifetime, the Baron was described por Helena Ravenclaw as a "hot-tempered man". He insisted on having his way in interactions, responding with violent uncontrolled anger when contradicted. As a ghost, he was frightening and most people did not seem to enjoy his presence, not even his fellow ghosts. However, he seemed to have a cordial, if not friendly, relationship with the ghost of Sir Nicholas de Mimsy Porpington, despite Ronald Weasley's allegations of the latter being "terrified" of him. The Baron seemed to be intolerant towards Peeves, who was scared of him, and could not urso his lack of civilisation, putting "his foot down" over the Poltergeist's presence in the 1994 Start-of-Term Feast.He also seems to have a great deal of House pride; before Harry Potter's arrival at Hogwarts, Slytherin had won the House Cup for six years in a row, and the Baron had become "unbearable" according to Nicholas de Mimsy-Porpington