Time for another one of my lists. This one is of all the times Harry has had a convo with inside his head, or heard a disembodied voice. I'll proally end up adding book/chapter notations to this.
Edit: Here's part of the motivation for this list, copied from reply #6.
I'm thinking along the lines of trying to see how crouded Harry's head is, either with presences, or the footprints of presences. One of the points of this is that if he is now dead, maybe if some of these presences were actually persistent, they can manifest to him in the spirit realm.
Telepathic communication: (these are less significant to me, but fit with the theme, so I'll get em out of the way first)
Elaine, WK
Merlin, TC
Ebenezer, Changes (2 way)
Disembodied Voices, and Presences
Female hand holder, SF
Lasciel, DM
Lasciel's Shadow, PG, WK
Unknown Female Voice in dream, DM
Quintus Cassius, Changes
The VoiceTM, Changes
Manifested presences within a dream
Harry's Id, FM? and DB
Kravos' Ghost, GP
Harry's Ghost GP
Malcom Dresden, DB
Lasciel, DM
Other significant manifestations
HHWB's shadow manifest to 3eye Junkie, SF
Maggie showed up within the soulgaze with Thomas (both sides), BR