Prompt: Temper
If anyone attempted to guess which Potter child had the worst temper, James would be the most obvious answer.
He was loud, Gryffindor and easily embarrassed.
Obvious.
But if you were to ask James which child had the worst temper, he would instantly answer Lily.
James had a lot of experience with Lily's rage. It wasn't his fault that he accidentally pushed all of her buttons).
People asked James how his sweet little sister harboured such a raging demon inside of her, he'd reply that she was a monster in disguise.
Freddie would laugh.
"You only know the true monster when you try and wake up James in the morning."
James would shove him.