Oh. No implications of romance here. [He waves a hand, shaking his head.] My own Bonded has had plenty of Bonds for the sake of convenience! One of which, was to Mikasa.

[But when she puts it like this... That puts the timeline into perspective. Maria had a Bonded, and lost it. After losing that one, she finally struck the deal with Eren after his face-off with Soren. It's still... an interesting way to put it, and Mettaton considers Maria's words heavily, rereading them.]

Mana-hungry... Why wouldn't one Witch be enough for a Monster? What gave you the impression that having two would stabilize his starvation for magic?