Carbuncle is a Cocoon fal'Cie in Final Fantasy XIII. Located in the Nutriculture Complex underneath Palumpolum, it is responsible for the city's food supply. Carbuncle is a large floating crystal with butterfly-like wings adorned with two faces similar to the ones adorning Barthandelus.
- See also: Datalog/The Fal'Cie.
Carbuncle is a Sanctum fal'Cie charged with food production. Stationed in Palumpolum's subterranean nutriculture complex, this fal'Cie oversees a process of ultra-efficient hydroponic farming employing mobile paddies and careful regulation of light and water.
A parallel process within the facility generates raw protein to supplement the vegetable foodstuff produced.
Hope shows Lightning the fal'Cie Carbuncle, with the latter wondering if they should attack it and thus destroy Cocoon's source of nourishment. Hope says they should leave it, since they do not want another reason for everyone to hate them.
The Carbuncle summon from previous games makes an appearance as popular plush toys sold in Nautilus. One appears in Palumpolum when Snow and Hope have a run in with an anti-l'Cie mob; Hope tries to help a girl and she throws her toy Carbuncle at him. After Snow separates them from the crowd, Hope picks up the doll, placing it on the debris and apologizes.
The fal'Cie Carbuncle also makes a cameo appearance in Orphan's Cradle. It appears when the player approaches one of the Eden waypoints. It, along with the other Cocoon fal'Cie, dies following the death of Orphan.
- Although it bears no visible similarity to the common summon of the series, it was assumed Carbuncle would make an appearance after it was revealed in teaser trailers. Carbuncle Eidolon appears in part of the Pompa Sancta parade with a design of previous incarnations of Carbuncle.
- A model for Carbuncle exists in the game disc of Final Fantasy XIII-2, although it never appears in the game, making it dummied content.