The Feline Blood Devil

Anywhere in the world after the year 1997.

Fiends are Devils that have taken over human corpses as their last resort to survive. Devils lose a significant amount of their supernatural power and ability to perform contracts after becoming a Fiend. Fiends can be identified by their distinct head shapes, such as Power's horns, Beam's shark head or Pingtsi's hair. Similar to how a Devil's appearance and set of powers may not always represent or fit the theme of their “name” (concept) the same can apply for Fiends.

Fiends will usually retain their original personalities they had as Devils. However, some Fiends retain more of the original corpse's brain than others, leading to their personalities becoming mingled such as Violence Fiend, who should be inclined towards violence, but instead prefers peace. It should be noted that this type of Fiend is extremely rare, being the exception not the rule, as well as how a "mingled" Fiend is still just a Devil whose own personality happened to absorb the traits and/or memories of the human as the actual human remains dead.

Devils are born in Hell. All Devils are born with a "name" that correlates to a concept. These can range from highly tangible (Fish, Tomato) to entirely abstract (Future, Curse). The concept does not have to refer to something that exists; there is no indication that ghosts, zombies or angels exist in the world, yet all these names have corresponding Devils. Each name is unique to its respective Devil, though some overlap based on specificity is possible as there have been both a War Devil and a World War II Devil. Devils manifest according to the collective consciousness surrounding their names (for example: the Gun Devil appears to be constructed out of guns and has gun related abilities). They are the embodiment of the fear that "name" represents, so as long as that "name" instills fear, they continue to reincarnate.