Pathfinder, character creation. Class medium, twist multiple spirits.

[Runemaximus]

For Pathfinder. The idea I'm having but not sure how to implement is like someone that is a spirit conduit of sorts, so access to multiple spirits. The idea I was having from a rp side is that the character won't be able to control which spirit comes through or maybe not even know he has these spirits coming out maybe black out losing time, like multiple personality disorder. The issue I am having is I'm not sure how to implement this. Maybe have multiple sheets prepared for the each spirit or has anyone done this before? Please help. Thank you in advance.

[zlefin]

I'd try using the occultist class Medium for this;
http://www.d20pfsrd.com/occult-adventures/occult-classes/medium

and add some homebrew mechanics (assuming dm permission) to get it a bit closer to what you're looking for.
maybe setup some mechanic where which spirit you get each day is random, and/or can change randomly throughout the day.