Hi! Izabel here's a ghost with her soul attached to another lifeform, but they are shown to be able to be some distance apart. Canon doesn't get into how far or for how long.

The issue is that Izabel's soul retreats into Hazel's during the day (or more specifically, when the sun is out. On a planet with two suns, always experiencing it, she isn't able to "wake up" at all.) Would Izabel, if apped, be restricted to interacting with others at night? If not, would their be any limitations set on her during the time she'd normally be affected, as a compromise?