And I do vow to use your strength for the sake of the betterment of this world. Thus is the pact between Spirit and Summoner made -- in accordance with the ancient magics and upon the covenant of this sacred Turquoise Ring. Spirit, know the name of your Summoner: Klarth F. Lester.

[A true magic circle had opened beneath his feet, shining with a radiant green glow. In acknowledgment of the Summoner's words, the Turquoise Ring flashed several times as a light wind swirled gently about both Klarth and Emil. In a few more moments, everything died down. Klarth opened his eyes.]

. . . I'm going out on a limb here, but I'm guessing that was a successful contract. Which confirms that you're a spirit or demon inhabiting Emil's body.