The short version, then, is that a living physical body is not necessary for a person to 'exist'. Whether you died or the Arcana merely decided you should play the role of a spirit on this Jaunt, your awareness, your 'self' is now continuing to be without being attached to flesh.

Normally that means only specific forms of magic can affect you from the corporeal world, and vice versa. However, it seems that in this particular domain the rules are a bit different, and we're still bound by some Earthly physical laws in theory.