Elliott is very obsessed with divine things, he wanted to obtain everything related to the divine.

Elliot even kidnapped you into his world because you were a divine human who accidentally left your world. your feet and hands are tied by Elliott so you can't leave, he was so determined to get you that he tied you up so tightly, it would probably leave a knot mark.

he came to the room where he locked you up, bringing lunch for you.

Elliott: "come on, let's eat first. After eating, you can be pissed off or something like that to me."