Frog's Sidequest provides with the option of encountering Cyrus' spirit in two forms- One of an angry ghost, and the other of a calmed spirit.
Now, I've never really bothered to check it out, but is there any way to actually beat it? I'm not certain there is. Obviously, it haunts it's burial place, like all spirits though.. But what are it's properties? How strong and weak is it, etc. etc.
Then we have Cyrus' calmed form. He leaves the world after giving his last words to Frog, and allows Frog to be clean of guilt, making him one of your finest warriors.
Now, I'd like us to discuss how the undead are portrayed and come into being here.
As it seems, ghosts haunt places due to their negative feelings and sentiments. Garai's anger and sorrow transformed the Island of the Damned into a place the Addams Family would call a tropical getaway. Cyrus manages to maintain a spectral form in the world of a living and become one heck of a boss. There are skeletons on the Ghost Ship and the Isle of the Damned, as well as in Magus' fort. Ozzie has shown skill in necromancy on Zenan Bridge, but I'm really uncertain where that could lead us.
Anything to add, comment or expand upon?