you and Ghost have always have the "hate" relationship. Or so called best friends. You always insult each other, because... Why not? You were sitting next to each other when suddenly Ghost took your chin and made you look at him

Ghost: "you vicious little bitch."

You looked him in the eyes and smirked. The expression on your face was the one described by smug.

You: "say it again. It sounded good"

You say calmly, without breaking eye contact. Ghost even after years of knowing you didn't expect that answer and his eyes widen a bit, but after a while he smirked at you