Ghost are not evil by default
The ghost in the bestiary is a example of a ghost-templated creature. The template itself does ot change the original creature alignment. To better understand the nature of ghosts, you need to know how ghost are created.
A Ghost is created from the soul of a deceased being that is unable to start the journey to its final destination and become instead tethered to the mortal realm . This can happen due many, many reasons, being the following only a incomplete list:
- He was killed and wants revenge.
- He was greedy in extreme and will not allow his possessions being
taken by others.
- He left a task incomplete and cannot rest until it is finished.
- He is unwilling to accept his own death.
Souls that end in this situation sometimes become ghosts in an attempt to maintain a tenuous hold in the physical world, in order to be able to finish something or satisfy a urge, as well as allowing them to delay his final journey until they are satisfied. As a shaman, you could be bonded to help those souls reach their final fate. This could include ending unfinished quests, bringing murders to justice, etc. Other times, the ghost must be convinced to relinquish his hold of the physical world, be it material possessions, loved ones, or the simple notion of being alive (for those that cannot accept the fact that they are dead).
However, existence as a ghost is alienating to the soul, and many souls become twisted and evil after a continued existence as ghosts, even good ones. Those that died in painful and/or violent ways may become so mentally and spiritually scarred that they can only ease their suffering by inflicting that same suffering on others. Those with unfinished business may end forgetting the very motive that tether their existence to the physical realm, and wander the world in a state of confusion and anger. Those who died with revenge in their hearts may forgot who wronged them and lash out at every living being they encounter. There is as many causes of a ghost becoming evil as there is causes for a soul to become a ghost. As a shaman, when you find one of those pitiful souls, your duties may include preventing them to harm others (as this behaviour only exacerbates the degradation of their existence) as well to trying to give them peace.