There's no Mist here.

[ Nico takes a seat on the couch, uninvited. Well - this whole thing was uninvited, no big deal. ]

In my world, there's this magic everywhere that mortals can't see through. Demigods usually can, unless someone's manipulating it. It hides magic, monsters, everything. I could ride a skeletal horse down Broadway, and people would see whatever made sense. They'd just see a mounted police officer.