Type: The Seirei is a manifestation of the unique chakra nature of the Yumena clan. Rarely, it will be accompanied by a kekkei tōta also found within the clan. - Origin: This kekkei genkai is limited to blood members of the Yumena clan, though every clan member will possess some degree of it. Its origin isn’t known, but it may be connected to the family’s roots as fortune tellers. - Notable Traits: Everyone who possesses a Seirei will have pupils that reflect light, appearing white or silvery, and pale feather-like markings on their cheeks. - Primary Ability: The Seimitōsurei is a unique chakra nature that causes a person’s chakra and ‘spirit’ to be partially or entirely ‘untethered’ from their body. - Secondary Effects: This untethering causes several effects, including precognitive dreams (untethered to time), dream-walking or visiting others’ dreams (untethered to space), and communicating with spirits and the dead (untethered to plane of existence). The degree to which a person’s Seirei is attached determines how powerful these effects are. - Combat Application: The Seirei typically does not have combat functions, but on very rare occasions a user can be born with the right combination of chakra natures to use their Seirei for the kekkei tōta Flare Release. ## Mechanics - Activation Requirements: The Seimitōsurei is inherited by blood and nothing else, and as a chakra nature is present from birth. However, Flare Release requires both a nearly or completely untethered Seirei, and affinities for Wind, Fire, and Lightning chakra, which makes it extremely rare even within the clan. - Sustainability: Most of the abilities of the Seirei are passive, and don’t drain chakra or energy. However, any active uses — such as Flare Release or meditated dream-states — do risk chakra drain. ## Weaknesses - Chakra Cost: Varies - Physical Strain: As noted, active uses of a Seirei can risk severe chakra drain and even possible death if not well-controlled, since they are in essence the user removing their chakra reserve from their body and manipulating it externally.
Trivia
Based on the several CLAMP manga characters who experience prophetic dreams
Ninjibot