Even as the human left the room, Mirajane let out a long, disappointed sigh.  "Typical," she said aloud to no one.  "Oh no, Mirajane, you have to stay here.  Can't let anyone see you, now can we?  No, that would mean I'd have to [i]share[/i] you with somebody.  No, you have to grant [i]my[/i] wishes, not everyone else's.  See the world?  Live your life?  Live [i]any[/i] life?  No no, Mirajane, you still have wishes to grant!"  She conjured a small pillow and then punched it across the room.  It disappeared on impact.  With a "tch!", she sank down to sit atop her lamp, arms crossed and a scowl on her face.

When he finally returned, she floated down to the floor.  Once the door was shut, her smoky tail again turned into solid legs, and she held out her hand expectantly.  She might be a servant, but she was no one's dog.