Castiel knew that Ruby thought about the way possession worked, in a way that no other demon had ever bothered to before. He was no fool, he knew she had taken bodies through force before, that was the difference between demons and angels after all. But what mattered to him was the here and now, the person she was when she was here with him. That was the Ruby he loved. "Consider it another part of a learning experience then," he smiled slightly.
"Oh we could bring it down just the same," he nodded with a smirk. "It won't be from hate, but you and me, we don't hold back and we'll make a storm worthy of being noted again." His pride demanded it after all. And they had time to make up for.
"I think you're better," he insisted, gently kissing her hair. "You're still on the journey learning who you're truly meant to be, but I have faith in you. I really do."