An insane smile forms in his lips, there is nothing that could make him feel more delighted in that moment. He drinks slowly this time, but still every time he swallows, he can't avoid to tremble in pleasure.
"Of course... I'll keep you close..." He states as he caresses the side of Mephiles' face with extreme tender, after he has finished to drink all the life away from him, stopping just exactly as his heart stopped beating; or whatever the curse made for Mephiles to be alive per se. If he had kept drinking, his death would have taken Shadow with him.
And he stares, in a sick tender manner at the other. He gets on his feet, picking the shadowed hedgehog up in his arms, as if he was merely sleeping, and placing him on his bed that Mephiles would use it for the first time maybe. Then he proceeds to lay next to him, curling with him, cuddling him close.
"...when you're awake... I'll drink you again, my other... He whispers in his ear, as if he could hear him. Closing his eyes, now that his hunger is satisfied, Shadow prepares himself to sleep; something he doesn't do often or extremely rarely. And so he does, all during the day, waiting patiently for Mephiles to be awaken and take his life once again.