Guess I'd better try t' get this straight, if I can.
Others
1. Arrancar
• Undead- not ghosts
• Can be made from Hollows, can form naturally
• Some weird-ass ranking system
• Led by Aizen (who isn't one / Edit: Shinigami)
2. Hollows
• Souls- haven't entered afterlife
• Hungry ghosts? Sound kinda like them...
• Dead → Hollows → Arrancar
2. Shinigami (their type)
• Dead already; can still die
• Also souls. Familiar.
• Have a 'zanpakuto' → sword? not scythe (Edit: Have wills/own mind)
• Organized; divisions, something like that
• 'substitute shinigami' → human/alive/shinigami
's still kind of confusing, though. Haa... Figure I'm open to corrections on this one.