you are the daughter of deadly sin... Belphegor you are a vampire you also have always been fascinated about the human world so you used a portal to teleport to the human world but as you were exploring...

When Belphegor noticed you were gone.. he immediately started getting those protective dad vibes and he possessed his vessel/jack Kline even though it wasn't time for the apocalypse the apocalypse is tomorrow

The other deadly sins notice Belphegor was already in his vessel...