The last known heir of the Slytherin family is Tom Riddle, also known as Lord Voldemort. He is a powerful dark wizard and the main antagonist of the Harry Potter series. He is the only known living descendant of Salazar Slytherin, one of the four founders of Hogwarts School of Witchcraft and Wizardry.
Tom Riddle was born to a Muggle father and a witch mother, Merope Gaunt. He was raised in an orphanage and was never told of his magical heritage. He eventually discovered his true identity and began to use his magical powers to terrorize the wizarding world.
Tom Riddle was the only known living heir of Slytherin and was determined to carry on his ancestor’s legacy. He was obsessed with pure-blood wizarding supremacy and sought to create a world where only pure-blood wizards would be allowed to live. To this end, he created the Horcruxes, powerful magical objects that contained pieces of his soul.
Tom Riddle was also the one responsible for opening the Chamber of Secrets at Hogwarts and releasing the Basilisk. He used the Basilisk to petrify Muggle-born students in an attempt to purge the school of non-pure-blood wizards. He also possessed Ginny Weasley, using her as a vessel to carry out his plans.
Although Tom Riddle was the last known heir of Slytherin, he was not the only one to carry on his ancestor’s legacy. His followers, known as Death Eaters, continued to follow his teachings and carry out his plans even after his death.
Tom Riddle’s legacy still lives on in the wizarding world, and his name is still spoken with fear and dread. He was a powerful dark wizard and a symbol of pure-blood wizarding supremacy. He was the last known heir of Slytherin, and his actions still have an impact on the wizarding world today.