Hadrian Potter is not like his family. The Potters are light. While Hadrian... Hadrian is something else entirely.

Hadrian Potter is brought up by Sirius Black, his godfather. The Potter moved to Germany with Hadrian's younger brother, Charlus Potter the WBWL, to learn enough to one day defeat the Dark Lord. The Potter return to see Hadrian in his fifth year and the King of Slytherin. Dark/Grey Harry -

Hadrian Potter was always treated as if he was never good enough. His parents, obsessed over his younger brother, Daniel, the WBWL. However, after Hadrian returns home from his fourth year at Hogwarts, everyone notices he not a little boy anymore, he's something else entirely. King Slytherin/Dark Hadrian.

Hadrian Potter is brought up and trained with Neville Longbottom who both ran away from their neglectful guardians. Years later, and known as the notorious criminals, 'Mortem Brothers,' Hadrian and Neville bring hell down on those that did them harm. Dark/Grey.