Triquetra Demon Seal

The Triquetra Demon Seal is the seal that keeps the Nine-Tailed Demon Fox sealed inside of Kaito Hiroki. Unlike Naruto's seal, this seal was created specifically to seal the Nine-Tails. It works similarly to Naruto's own Four Symbols Seal, blending in small amounts of the Nine-Tail's Chakra with Kaito's own chakra.