Ranma possessed.

[Muramasa]

That's right. I'm looking for fanfiction that involves some kind of entity inhabiting (as in sharing) the body of one Ranma Saotome. It can be spiritual, magical, friendly, *very* friendly, disturbing, hostile and/or quite malicious.

Preference to stories that keep Ranma atleast reasonably in character.

And once again, thank you very much in advance.

[Sunshine Temple]

"Relatively Absent" by Togashi Gaijin
http://gaijinsrealm.com/index.shtml

That has the "Time Gates" talking in Ranma's head.

"Practical Mythology" by Stratagemini
http://www.fanfiction.net/u/47784/
is the reverse. Ranma's in Ami's head

There are also quite a few where Ranma's past life as a Senshi is present. Though that may not count as a separate inhabitant.

[PCHeintz72]

There was a thread here in the search section on split personality or voices in the head... would that not be the same thing? At a minimum I would think there would be some overlap. If so, try:

Split personality / Voice in head
- [Direct] http://www.fukufics.com/viewtopic.php?t=2520

[Dinurs]

Shinobi OneHalf have Ranma with some kind of demon and Nabik have one as well (It's a Naruto crossover)

http://www.fanfiction.net/s/3483076/1/Shinobi_OneHalf

Shinobi OneHalf » by Innortal reviews
A betrayal at a shrine, tossed into a new world to be saved. What does this line of destiny have in store for Ranma and Nabiki.Now corrected for the Fourth Hokage's real name.
Ranma - Fiction Rated: M - English - General - Chapters: 4 - Words: 35,010 - Reviews: 176 - Updated: 5-25-08 - Published: 4-9-07