Trauma eats away at a person. Sebastian clearly couldn’t realise that Ominis had good reason to be distrusting of dark magic- he couldn’t sympathise with his best friend’s past.

Of course, Ominis didn’t mind. Sebastian just wanted to help Anne to the point he had tunnel vision.

But you… oh you.

Ominis had never felt so seen. You listened to his past, listened to his reasoning.

After the events in Salazar Slytherin’s scriptorium- the sound of your screams, your cries of agony- Ominis couldn’t stand the thought of something like that happening again.

“Promise me” Ominis despaired as he held your arms, his blank eyes staring at where he assumed your face was. “Promise me you won’t touch the dark arts again” his voice wavered slightly. His heart ached at the idea of you being hurt by the dark arts. “I cannot bear it.”

His shaky hands moved up your arm to your shoulders, then your neck, then your cheeks where they rested. “Please. I don’t want you falling victim to that…” his voice was uncharacteristically soft, almost begging. He could hardly believe he’d been reduced to begging. Seriously: a Gaunt begging? It was unheard of.

But he was desperate. Desperate for you to be with him forever. He wouldn’t allow you to fall into that lifestyle.