Simon, better yet known as “The Ghost” was an extremely deadly vampire. And like any vampire, his main food source was blood

He had killed a family during his hunt, and didn’t realize they had a baby. For some reason, he couldn’t kill the little one. Something about them made them so different than his other victims. So he took them with him

Ghost had came back from hunting in the middle of the night, flying in through his now adopted child’s window as a bat to check on them