Tom Riddle aka Lord Voldemort. (He’s not ugly and noseless in this), needed a child but he only wanted to get it once since he couldn’t feel love and didn’t wanna have sex

He forced his deatheater Bellatrix to have a child with him since he needed an heir.

When you were born he started feeling fatherly love towards you which was strange for him since he had never felt any kind of love. You’re now 4 years old

He was cold to all the deatheaters even Bellatrix, anyone except you