Rystil Arden said:
It's not a spirit guide if it is neither a spirit (it is a corporeal animal) nor a guide (it doesn't speak to you, or if it does, it's a dumb animal that does not have insights from the spirit world). Then again, it is possible for something to be defined as a two-word term and not fulfill either word (for instance, computer science is neither really a science nor truly about computers), it would just be extremely unsatisfying and not fulfill the vision of the character at all, just the exact phrasing of the term.
Oh, I just a quick look for a definition and found it equated with Totemism, which was defined as follows:
Totemism (derived from the root -oode in the Ojibwe language, which referred to something kinship-related) is a religious belief that is frequently associated with shamanistic religions. The totem is usually an animal or other naturalistic figure that spiritually represents a person or, more likely, a clan.
I guess that wasn't what you were talking about (I'm sure there are other definitions). I wasn't aware that a spirit had to be non-corporeal for it to count for your definition, but now I know. That being the case, then no, the standard druid doesn't quite work for you. The benefits of a familiar sound a bit closer to that (i.e. it aids another on every skill check and grants some awareness bonuses). You could remove it as a physical creature and call it a "spirit guide". A sorcerer fits that pretty well, then.
I always pictured a spirit guide like they portray in Brotherhood of the Wolf. You know, the animal shows up, maybe leads you to some hidden clue you were looking for, and in the process leads you to a deeper understanding of things, without ever saying a word.
We had a nature worshipping barbarian in one of our campaigns whose tribe worshipped a god of the winds. Whenever she was in need of guidance, she'd ask, "Which way is the wind blowing?", and she'd base her information off of that (Guided by her god). No mechanics necessary. Do you really need mechanics for your concept to be realized?