It's been established that when Nine gets scared or feels threatened, he reacts by intimidation or anger, depending on the situation. It's his go-to instinct developed as a reaction to his trauma. As a way to protect himself.
And here, Nine is fucking terrified! He started hyperventilating, his pupils contracting with terror. The root cause of Nine's trauma was getting bullied and beaten up for years. All he wished for was for a safe, isolated place to call his own without having someone invading it.
And now, his greatest fear is coming true... His safe haven, his home, getting invaded by people who hold malicious intent for him.
Can you imagine the flashbacks he could've been having? The fear? The past coming to haunt him again, the thing he dreaded most coming back around to hurt him even worse. Can you imagine encountering the root of your trauma striking with a vengeance? And on your journey to try and heal from it no less.
He doesn't deserve this
