Unsent Unsent is a state of being in Spira in " Final Fantasy X " and " Final Fantasy X - 2 " , and the common name for those in that state . When a person dies his or her spirit enters the Farplane , either willingly by having accepted death , or with the help of a summoner performing a sending . If a person ' s spirit does not enter the Farplane it will remain on Spira as an " unsent " , where the person ' s pyreflies reconstruct their body , usually in their old image . The unsent can still send their own souls no matter how long they have lingered and their bodies will disperse into pyreflies . Unsent are typically overcome by malice and often begin to resent the living , eventually becoming fiends , though some unsent retain a corporeal state and a rational mind ; this is associated with the unsent who have a strong conviction of some kind , such as a " mission " they feel compelled to complete . Some unsent can adopt the shape of a fiend at will , and absorb others ' pyreflies to grow stronger . Different unsents ' bodies take different forms . Some unsent spirits remain identical to how they were in life , but some go through changes , and may appear to age even when biologically immortal . Shuyin is a different type of unsent , as his pyreflies do not form a physical body , instead , the pyreflies are only " imprinted " with his hatred and act on their own and can possess the bodies of the living . " Final Fantasy X - 2 . 5 ~ Eien no Daishō ~ " , a companion novel and sequel to " Final Fantasy X - 2 " , describes how the deceased may remain conscious through their own death and have a modicum of autonomy on deciding to either " descend to hell " ( might simply refer to the Farplane ) or remain and become a fiend . Once the deceased has entered a Farplane they usually must remain there , but there are known to be exceptions . Jyscal Guado ' s spirit emerges from the Farplane to deliver Yuna a sphere recording , assuming a form akin to an unsent even if he was sent upon his death . In " Final Fantasy X - 2 . 5 ~ Eien no Daishō ~ " and " Final Fantasy X - Will - " other spirits return from the Farplane as well in a phenomenon known as the beckoning . Origin . The concept of the unsent in " Final Fantasy X " is similar to the Japanese folklore of the " " , which may have inspired their design . According to traditional Japanese beliefs all humans have a soul , and upon a person ' s death the soul leaves the body and enters a form of purgatory , where it waits for the funeral and post - funeral rites to be performed so that it may join its ancestors . However , if one dies in a sudden or violent manner , such as murder or suicide , if the proper rites have not been performed , or if they are influenced by powerful emotions — such as a desire for revenge , love , jealousy , hatred or sorrow — the soul transforms into a " yūrei " , which can bridge the gap back to the physical world . The " yūrei " exists on Earth until it can be laid to rest , either by performing the missing rituals , or resolving the emotional conflict that still ties it to the physical plane . If the rituals are not completed , or the conflict left unresolved , the " yūrei " will persist in its haunting . " Yūrei " are frequently depicted as being accompanied by a pair of floating flames or will o ' the wisps that are separate parts of the ghost rather than independent spirits . This is similar to how the unsent in " Final Fantasy X " are related to pyreflies .