Rinne (燐子, Servants, lit. "light-bearing child") are beings who act as servants for certain Crimson Lords or Denizens. They are usually created by their master and, as unstable existences, require a constant replenishment of Power of Existence from either their master or through consumption of humans and give it to master to convert it for their usage in order to survive. They usually possess the same color of Flame as the Denizen who created them. Without their master, they will disappear because they are unable to convert the Power of Existence for their own usage. As noted by Shana when she is incarcerated in the Seireiden and stripped of her powers, though the Rinne are usually weak enough to be easily dealt with by Flame Hazes, they are still powerful enough to easily dispose of normal humans.
Rinne of the Autonomous Type (自律タイプ Jiritsu Taipu ) are able to think for themselves and act independently.
The Rinne of the Autonomous Type that have been seen over the course of the series are:
- Marianne, Nina, Lauretta, other names unknown: Created by Friagne
- Domino: Created by Dantalion
- A stray with unknown name (first season anime original): Creator is also Friagne.
- Maids of unknown name, Shana's minders at Seireiden: Creator is unknown, administered by Bal Masqué
- Giant Ant Lion type (third season anime original): Creator is unknown
Rinne of the Tool Type (道具タイプ Dōgu Taipu ) are incapable of doing anything unless programmed or ordered to by their creators or current users.
The Rinne of the Tool Type that have been seen over the course of the series are:
- Pinion: Created by Tiriel
- Aeria: Created by Merihim
- Ukobach's aid (semi-autonomous when ordered): Created by Ukobach
- Shihōki: Created by Gaap
- Moddey: Created by Doog
- Taijinkunshi-gō and Onjūtonkō-gō: Created by Para
- Centipede type: Created by Ōnamuchi
- Cannon type: Created by various Bal Masqué Denizens
- Improved Cannon type: Created by various Bal Masqué Denizens, Haborym's army
- Plant type: Possibly created by Bel Peol
- Sabrac's scapegoat: Created by Bel Peol
|Character related||Colored Silhouette • Crimson Denizen • Crimson Lord • Crimson God • Faux Vessel • Flame Haze • Kraken • Mystes • Rinne • Servant • Torch • Tuner • Unrestricted Spell Master|
|Conflicts||Ancient War • Sovereign's Game • Great War • Civil War • Révolution War • Second Great War • Chaotic Period|
|Events||Misago Festival • Seishū Festival|
|Items||Crystallization of Self-Research • Treasure Tool • Vessel|
|Creations||Divine Gate • Iron Giant • Statue of Pride|
|Metaphysics||Divine Summoning • Flame • Manifestation • Power of Existence • Rift Crossing • The Truth of This World • Unrestricted Spell|
|Organizations||Bal Masqué • Brothers of the Maccabee • Hyakki Yakō • Jewel Gang • Minack • Outlaw • Révolution • Töten Glocke|
|Phenomena||Distortion • Great Calamity • Faint Heaven Quake|
|World||Crimson Realm • Great Binding Chain • Maelstrom of Warfare • Rift Between Both Worlds • Xanadu|