The servant thing is just how it works, I guess. [He strips off a fingerless glove and shows her the strange markings on the back of his hand.] These appeared when I summoned her. She's not -- the same as the rest of us. From what I know, I could "command" her for a while and use her to... accomplish whatever plans I had. She mentioned something about a Relic.
[He sighs, regloving his hand.] I told her time and again I have no intention of thinking of her that way, but she's stubborn as I've ever seen.
As for the collar, who knows? Maybe she wanted to make sure I won't touch her again. Maybe she wanted to punish herself for something so unforgivable. [Sliiightly bitter, yeah.]