An important part of the Future Arc, the Rings allow people to bring out their and use it to power Box Weapons. There is a ranking for the Rings that range from (weakest) to A-rank (strongest), with the Vongola and Mare Rings and the Arcobaleno Pacifiers being exceptionally ranked as S-rank.
The ranks of the Rings establish and imply several things. The most notable is the output of the Rings: Since Rings cannot create Flames, only release them, weaker ranks cannot release as much of a Flame output as a higher ranked Ring can. Furthermore, other things such as purity of the Flame and effectiveness of the Flame in terms of activating Box Weapons are also determined by rank.
Types of Rings
Tri-ni-set (7³)
In the Future Arc, the Tri-Ni-Set is made up of the Arcobaleno Pacifiers, Vongola Rings, and the Mare Rings. Together, these twenty-one Rings are said to have shaped the world and can grant the person who uses them all the ability to recreate it to their liking. It is Byakuran's main goal to gather the Tri-Ni-Set, and to do so, he aims to destroy the Vongola Guardians to obtain their Vongola Rings. Due to the demiurge-like nature of the Tri-Ni-Set, each possessor of a Sky Tri-Ni-Set is born with powers resembling each part of the Tri-Ni-Set's duty in the creation of existence and the establishment of the timestream.
Arcobaleno Pacifiers
These sets of Pacifiers are like Rings. They are worn by the Arcobaleno. They are the first Rings to be seen in the series. They are worn by:
- Sky Pacifier - Luce, Aria and Yuni (Owner deceased as of the Future).
- Sun Pacifier - Reborn
- Lightning Pacifier - Verde
- Mist Pacifier - Viper
- Storm Pacifier - Fon
- Rain Pacifier - Colonnello
- Cloud Pacifier - Skull
The Sky Pacifier reserves the Ability to revive the Arcobaleno, should they be killed. It also, serving its purpose in the structure of the time stream, represents and establishes two distinct points in time. It is said that Arcobaleno means "Rainbow", with each side of the Rainbow serving as the symbolic two points in the time stream.
Vongola Rings
These Rings are worn by the current Vongola Guardians after a new successor to the Vongola Famiglia is chosen. They are worn by:
- Sky Ring - Tsunayoshi Sawada
- Cloud Ring - Kyoya Hibari
- Sun Ring - Ryohei Sasagawa
- Rain Ring - Takeshi Yamamoto
- Mist Ring - Chrome Dokuro
- Storm Ring - Hayato Gokudera
- Lightning Ring - Lambo
- Snow Ring - Gerallo (Reborn! Game Only)
The Vongola Rings serve as the vertical axis of the timestream, granting the Sky Ring user the Ability of harnessing the knowledge and Abilities of his Family line. This is manifested in Tsunayoshi Sawada's "Hyper Intuition" and his communication with Vongola Primo. It is said that Vongola means "Shellfish", noting its duty in the Vongola Rings' structuring of existence. Among the Tri-Ni-Set, it has the highest and purest Flame outputs when its "Shackles" were removed by the Vongola Primo.
Mare Rings
These Rings were held by the Six Funeral Wreaths and Byakuran of the Millefiore Famiglia. However they were sealed in the past after Byakurans defeat. They were worn by:
- Sky Ring - Byakuran (Owner deceased) (Ring Sealed)
- Lightning Ring - Ghost (Owner deceased) (Ring Sealed)
- Cloud Ring - Kikyo (Ring Sealed)
- Rain Ring - Bluebell (Owner deceased) (Ring Sealed)
- Storm Ring - Zakuro (Owner deceased) (Ring Sealed)
- Mist Ring - Torikabuto (Ring Sealed)
- Sun Ring - Daisy (Owner deceased) (Ring Sealed)
The Mare Rings serve as the horizontal axis of the timestream, granting the user of the Sky Ring the Ability to see himself across all parallel realities. This is represented in the meaning of Mare, "Ocean", explaining the all encompassing influence on the timeline. It is established, however, that Byakuran possessed this Ability prior to obtaining the Mare Ring of Sky as he is the Ring's chosen wielder.
Sets of Rings
Hell Rings
These Rings are six of the most powerful Mist-Attribute Rings. When they are used in excess they can possess the user and unleash a great amount of power. But if the user cannot control its power, the Hell Ring can cause a drastic change in personality. Currently, the owners of 5 of the 6 Rings have been shown. The official name is only known for one of the Hell Rings: the Ossa Impressione (Italian for Bones Impression) Hell Ring, used by Genkishi.
- Eye Hell Ring - Mukuro Rokudo
- Vined Orb Hell Ring - Mukuro Rokudo
- Serpent Hell Ring - Kawahira
- Ossa Impressione - Genkishi (Owner deceased)
- 666 Hell Ring - Fran
- Horn Hell Ring - Unknown
Varia Rings
In the Future Arc, the Varia appear to have customized Rings of an unknown rank, that are engraved with the Varia crest. Due to no replacement for the Varia Cloud Guardain, there is no Cloud Varia Ring.
- Sky Ring - Xanxus
- Rain Ring - Superbia Squalo
- Sun Ring - Lussuria
- Storm Ring - Belphegor
- Lightning Ring - Leviathan
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. They were described by Byakuran as "beautiful stones of Rank-A", but he said that the Real Mare Rings were "a lot more special." Shoichi's Fake Sun Mare Ring was destroyed by Byakuran due to his betrayal, but the others only had their wings clipped.
- Sun Ring - Shoichi Irie (Ring destroyed)
- Mist Ring - Genkishi (Owner deceased)
- Lightning Ring - Gamma (Owner deceased)
- Rain Ring - Glo Xinia
- Storm Ring - Rasiel (Owner deceased)
Shimon Rings
A Ring in this was shown when Enma was picking up his textbooks with the help of Tsuna, it was hanging from Enma's neck. His eyes resemble this Ring. His Ring is likely to be part of a Shimon Family Set.
Vongola Box Rings
At the end of the Future Arc after Byakuran was defeated, the Vongola were told that they can't take the Vongola Boxes with them, so with Verde's help, the Vongola Boxes were turned into Rings.
Other Rings
- Lanchia's Boss Ring - Given to Tsuna by Lanchia. Tsuna brought this Ring along with him to the Future, and it later protects him from Byakuran's Mini White Dragon. If it follows the pattern of previous Boss's Rings, it could possibly have the Sky Attribute.
- Hayato Gokudera's Skull Rings -The Rings that belong to the Sistema C.A.I. and are of the Lightning, Rain, Sun, and Cloud Attributes.
- Lal Mirch's Stealth Ring - Customized Mist Ring that the user will be undetected under enemy's camera.