You see, they envy the living. And in time, that envy turns to anger, even hate. Should these souls remain in Spira, they become fiends that prey on the living.

In the world of Final Fantasy X, fiend (魔物, Mamono?, lit. Demon) is a Spiran term for the monsters which inhabit the land, the spirits of the dead who stay in the living world instead of departing to the Farplane, refusing to accept their time has come. Many of these ghosts are purposeless and unable to cope with the changes caused by their deaths.


Consumed by sadness and rage, the spirits use pyreflies to assume a warped physical form. Each fiend is a reflection of the person they were in life in some form ranging from an embodiment of their greatest desire to an appearance reflecting a misdeed. There are also fiends that came into existence without being alive to begin with, as well as living creatures categorized with fiends, like Cactuar, who are simply a part of a life cycle of desert cacti.

Tidus fights in baaj

A defeated fiend disperse into pyreflies.

Fiends are often driven to prey on the living, but there are also fiends who pose no threat and attack when their homes are invaded. Regardless, summoners perform a sending to guide the wayward souls to the Farplane before they can become fiends, or after a fiend is vanquished with the pyreflies making its physical form dispersing. After the Eternal Calm the tradition of performing sendings seems to have ended, and the fiends can only send themselves on the condition they fulfill an obligation they failed to achieve in life. Final Fantasy X-2 Ultimania Omega elaborates that pyreflies continue to appear in great numbers after the Eternal Calm because the destruction of Sin had broken the cycle of sending the dead to the Farplane resulting in the sudden increase of fiends as pyreflies are their lifeforce.[1]

Not all unsent are destined to be transformed into fiends instantly, some maintaining the forms they had in life because of a strong desire and sense of purpose. Many fiends are able to revert to the forms they had in life, only few of them able to maintain the form for a long period of time and effectively gaining a second chance at life. Some unsent are able to transform into fiendish forms by absorbing pyreflies into their bodies.

Despite their hatred and envy, fiends can be tamed, as shown in Final Fantasy X-2.

Types of fiendsEdit


A fiend is an evil spirit or a demon in mythology.


  • While Final Fantasy X-2 reuses a lot of enemy models from Final Fantasy X, most of the reused enemies have different names.
  • The fiends' nature most likely alludes to a prevalent Shinto belief that the spirits of those murdered or died without being shown gratitude for their sacrifice will hold a grudge that eventually turns them into powerful and evil kami, a Japanese concept of a "supernatural being," to take revenge.


  1. Final Fantasy X-2 Ultimania Omega p085