Harry is a creature
Harry A couple of weeks before he gets his first Hogwarts letter is attacked and bitten by a mysterious creature. (You choose who creature) And in the next couple of days harry notices that he has had growth spurts and seems to be stronger and faster and his eye sight has healed.
When Harry first meets Hermione he has a very strong instinct that no matter what he has to be with her in any way possible.
Harry spends most if his time with Hermione Studying with her and just talking to her.
When Ron upsets Hermione he gets angry an yells at him.
Harry runs after Hermione and manages to help her feel better but as they are going to the great hall they run into the troll. Harry gets angry when it goes after Hermione so he accidentally does wandless and non verbal magic to lift up the club and hit it's head many times almost killing it in the process.