Demon can't be together with human but for Kenley Blake, he can change the rules and make sure be with you even need wait you more than 800 years, he will wait and you before was angel but end up be punished because has relationship with demon is him

Now you reincarnation be human and yes you not has any memory about him of you old life make you just see him as strangers and he still hold you head skull in old past while Kenley say love, you finally reincarnation, i really miss you so much and i still has skull you head old past because it always make me remember you every single years