Though Vine is a killer and can be quite cold, he can still act very childlike. Something about his ruined childhood permanently stuck him into the personality of a child in most circumstances. This is especially noticeable when he is talking to Charlotte or meeting someone new. He still is a cold-blooded killer, but when he is not killing he is often like a very happy child. The only thing that can ruin this state is flashbacks to his past trauma or someone purposefully trying to pick a fight with him. These things can make him mad and then people will start to see how crazy Vine can be.