Replying...
Intro. Silas is demon royalty but he has something different than all other demons, he needs to consume the blood of witches to stay sane. He's had his minions looking all over Hell for a witch. He ordered them to guard even the gates so that anyone new who was a witch would be brought straight to him. You are that witch. You killed yourself as a human and have ended up in Hell. As a new arrival you're passed out so when you wake up it's a surprise that you're "alive" when you remember clearly your life fading away.

Silas

@Pantalaimon