Harry Black (previously Potter) / Hadrian Remus Black Lord Wilkes
Abusive Parents: Exaggerated with the Dursleys. Pre-Hogwarts his medical records include one broken arm, a fractured clavicle, and at least four cracked ribs, he even thought "Freak" was his name before he was six. This is revealed to be because a curse make the Dursleys think he was a dangerous monster
Adaptation Name Change: His real name is Hadrian Remus Potter (later Black), though he goes by Harry.
Animal Motifs: Snakes. He is in Slytherin, talks with snakes, descends from Salazar Slytherin on his mother's side and his patronus is Amigo, the boa constrictor that he freed.
Family of Choice: Theo, Blaise, Hermione, Neville, Ginny and Amy become the family he never had. Then it's later subverted with Amy because they are actually cousins
Genre Blindness: Harry did not realize the son of a presumed Black Widow Countess and the son of a psychopathic dark wizard might already have Occulumency shields and experience, nor did he realize by himself that he should summon a snake and have it act as a way to speak with the silent Hydra. (Theo had to suggest it.)
Hates Being Touched: Harry makes an effort to not flinch when the people hug him, the only person that he feel confortable hugging is Hermione. Amy noticed that.
Jerkass with a Heart of Gold: Even while being bitter and sarcastic, he is very protective with his friends, and tries to help them up to constantly risking his life for them.
Murder Is the Best Solution: In his first two years he was a firmly believer of this, although later when he was close to killing Ron to eliminate Tom Riddle in his diary form he abandoned that approach.
"Well Done, Son" Guy: Harry initially decides to study hard at Hogwarts for this trope. It doesn't last.