I have one spirit that is "sidekick", one that is "driftwood", and one that is "ack-ack" (?). What are the available spirit dispositions, and what do they mean? Are there different trees of dispositions or is it all one giant continuum?
Every spirit has its own set of 4 dispositions, and each effects how it attacks. Generally, but not always, it falls into one of 4 categories:
With a lot of variance depending on the type of spirit. The full list of spirits and dispositions can be found here, but there are too many to list.