An important part of the Future Arc, the rings allow guardians to use their Dying Will Flame and put them into Boxes that have advance weapons in them based on modern/advance technology, plants or mostly seen animals. There are different Ranks to the Rings that change the purity of the flame and hence effect the strength of the box weapon. They range from E (weakest) to A (strongest). It also appears that the higher the rank of the ring, the more dying will flames it can handle before it shatters. A good example of this is Kyoya Hibari, when using rank C and D cloud rings, the rings would shatter after only one use, but when a young Hibari used his Vongola Ring it could easily withstand his extreme dying will flame without breaking.
Sets of Rings
Arcobaleno Pacifiers
These sets of pacifier are like rings. They are worn by the Arcobaleno. They are the first rings to be seen in the series. These rings, along with the Vongola Rings and the Mare Rings make up the Tri-ni-set (7³), three sets of extremely powerful rings that are said to have created the world. They are currently worn by:
- Sky Pacifier - Uni/Luche
- Storm Pacifier - Fon
- Rain Pacifier -Colonnello
- Cloud Pacifier - Skull
- Lightning Pacifier -Verde
- Mist Pacifier -Viper
- Sun Pacifier -Reborn
Vongola Rings
These rings are worn by the current Vongola Guardians after a new successor to the Vongola Famiglia is chosen. These rings, along with the Arcobaleno Pacifiers and the Mare Rings make up the Tri-ni-set (7³), three sets of extremely powerful rings that are said to have created the world. They are currently worn by:
- Sky Ring - Tsunayoshi Sawada
- Storm Ring - Hayato Gokudera
- Rain Ring - Takeshi Yamamoto
- Cloud Ring - Kyoya Hibari
- Lightning Ring - Lambo
- Mist Ring - Chrome Dokuro
- Sun Ring - Ryohei Sasagawa
Mare Rings
These rings are held by the Six Funeral Wreaths and Byakuran of the Millefiore Famiglia and are part of the Tri-ni-set (7³). Currently it is unknown which of the Wreaths has which ring, except for the Sky ring which is worn by Byakuran. The rest of the Mare rings are in the possession of Bluebell, Kikyo, Zakuro, Torikabuto, Daisy and an, as of yet, unnamed person.
- Sky Ring - Byakuran
- Storm Ring - Zakuro
- Rain Ring - Bluebell
- Cloud Ring - Kikyo
- Lightning Ring - unkown
- Mist Ring - Torikabuto
- Sun Ring - Daisy
Fake Mare Rings
These rings were worn by what were thought to be the Six Funeral Wreaths before Byakuran revealed that the rings that they were using were fakes and destroyed the rings. They were described by Byakuran to be "beautiful stones of A rank", but he said that the real Mare Rings were "a lot more special."
- Storm - Rasiel
- Rain - Glo Xinia
- Lightning - Gamma
- Mist - Genkishi
- Sun - Shoichi Irie
- Cloud - unknown
Note: The stones for these rings appeared to be undamaged, but it is unknown if it is possible for them to be remade into A rank rings.
Hell Rings
These rings are 6 of the most powerful Mist rings. When they are used to excess they can possess the user and unleash a great amount of power. But the side effect are a change in personality Currently, the users of 4 of the 6 rings have been shown. The official name is only known to one of the Hell Rings: the Ossa Impressione (Italian for bone impression) Hell Ring, which is shaped like a misty skull.
- '666' ring - Fran
- Ossa Impressione Hell Ring - Genkishi
- Eye shaped ring - Mukuro Rokudo
- Vine covered orb shaped ring - Mukuro Rokudo
- Horn shaped ring - unknown
- Snake shaped ring - unknown
Other Rings
Lanchia's Boss's Ring