Tom Riddle!¹

Tom Marvolo Riddle was born on 31 December 1926 at Woolwich Orphanage in London, England. His pure-blood mother, Merope Gaunt, a direct descendant of Salazar Slytherin, staggered up the steps of the orphanage and was taken in. An hour later she had a baby boy, and another hour later Merope was dead. Before she died, the witch named her son after his father, Tom Riddle Sr., and named his middle name after his grandfather, Marvolo Gaunt. Tom Riddle Sr. had been a wealthy Muggle resident of the village of Little Hangleton who had become romantically involved with Merope Gaunt, possibly through the influence of a love potion.[12] After a time, Merope possibly withdrew the use of the magical solution, hoping that the young man had truly fallen in love with her, or at least would stay for the sake of her unborn child. However, the Muggle abandoned her and Tom, later going to live in his parents' mansion.[13]

He was a very complex person, characterized by manipulation, sadism, cruelty, and megalomania. He displayed a dual personality: he appeared to be a model and kind student at Hogwarts, while in reality, he was an extremely cruel and intelligent person.

First of all, Tom Riddle is almost universally classified as an INTJ MBTI type. Furthermore, many people seem to believe that Tom Riddle was asexual.