 In Spira , when a person dies suddenly and unexpectedly , his or her life force , manifested as pyreflies , must be released from the body and sent to the Farplane , the final resting place of departed souls . If the sending is not performed , the body 's spirit may remain trapped in the physical plane and take on the form of a fiend . A spirit of the dead may resist the transformation into a fiend , even when not sent and remain amongst the living , they are " unsent " . The unsent play a prominent role in the storyline and mythos , including the playable character Auron and other characters including Maester Jyscal Guado , Shuyin , and Lady Yunalesca . 
