Gray Kazuki (グレー一樹, Kazuki Gray) is a Tokubetsu Jōnin-ranked Shinobi for his exceptional skill in the area of Nature Transformation who is a part of the Kazuki Clan. He resides in Konohagakure, alongside his childhood friend and rival Kenji Nagakura and maternal uncle Shin Takahiro, forming the three-man cell known as Team Takahiro (チーム隆弘, Chīmu Takahiro). His usage and early maturity of his clans Kekkei Genkai has led to his nickname among the Shinobi of Konoha of Kazuki of the Burittsuai. He once formed a Genin-team with Kenji Nagakura and Harumi Misuteri, under his uncle Shin.