I think I'm going to name it Problem. Because that's what it is! But let's keep on topic!!

[He's really not going to let Hanna worm out of it, unless he happens to hang up or something of the like. Which Mettaton will find Rude with a capital R, but also he might self-reflect a little at that.]

If you did want him around, or had no particular compunctions, then the ghost wouldn't be hanging around you now, would it? I'm just pointing the obvious out, sweetheart!!