By "anime" I would assume that you are referring to the latin meaning of spirit/soul/mind...in latin one word can have a larger definition than our typical english. So the "life force" persay.
Well if you are interested in such things I would study shamanism, especially that of the native american sort. It is very difficult to find such information on the internet, so if you do try, you're looking at days of searching for a good and accurate website through lesser known search engines (not google).
The native americans are very big on animism (the belief that all things in nature contain a "numen" or spirit).
Through astral projection aka "journeying" the spirit/conscious mind can become one with nearly anything and be capable of connecting immensely with the object, animal, plant, etc. Connecting in this way with humans however is dangerous for both the traveler and the person they are connecting to. This is the way that shamans heal emotionally, physically, mentally, and spiritually when the situation is not responsive to ritual and medicine.