Ranmaru

Ranmaru (蘭丸, Ranmaru?)Ranmaru was an orphan growing up in the Water Country. What happened to the rest of his clan is unclear, but because he grew up in the Water Country, it is possible they were killed when the populace turned against the bloodlines. His traits include penetrating vision and a unique chakra particle extension. He had the ability to use his vision abilities to penetrate the walls of his small shack and view the outside world. This ability does not appear to have the range of the Byakugan, but it actually has the ability to counter that Hyuuga trait.

Ranmaru's vision grants him a greater ability to see ones' life force, even beyond the Hyuuga's internal chakra perception. This allowed him to determine that Raiga, who had recently fallen in battle, was still alive. This was something Neji's Byakugan could not sense.

Ranmaru could also extend his chakra out in red dust-like particles to create phantoms and hide his own chakra presence. The phantoms appeared to have functionality only when used in conjunction with Raiga's Kirigakure technique. The spectral images could be granted life-like chakra flows to confuse both normal ninja and Neji's Byakugan.

Synopsis
Ranmaru is first introduced, spotting Rourusuke's party escaping from Katabame Kinzan for Raiga. Raiga and Ranmaru fight Naruto and Team Guy when they arrive to defeat the Kurosuki family. Raiga initially gains the advantage due to Ranmaru's abilities and his powerful lightning jutsu, but after Ranmaru is knocked away from Raiga, Raiga becomes distraught over losing him, and Naruto knocks him off a cliff. Ranmaru then reveals his role and past to the Leaf ninja and asks to die. Naruto's group leaves him in a small shed on the mountain and take him back to the Curry of Life Shop after defeating the remaining Kurosuki family members.

Karashi takes Ranmaru on his back, and takes him to Raiga, who is not yet dead. Ranmaru revives him with his chakra, but passes out, seemingly dead, from doing so, causing Raiga to demand that Karashi bring him the Leaf genin. Tenten discovers that Ranmaru is alive, and takes him to a shed in the middle of a thunderstorm, trying to cool down his fever. While Ranmaru is willing to die, Tenten tells him that he does not deserve to decide that, as the people he helped Raiga kill could not make that decision. Ranmaru recovers his health, and becomes able to walk, after eating the Curry of Life and wishes for Raiga to eat it.

Ranmaru accompanies Tenten, Sanshou and Karashi to the mountain where Neji, Lee and Naruto are fighting Raiga, feeding the wounded ninja the curry. Ranmaru returns to Raiga and using his mist, tries to trick him into walking over a cliff, in order to atone for his actions. The plan fails when Lee attacks and interrupts Raiga, and when Ranmaru attempts to convince Raiga to stop the battle, Raiga believes that Ranmaru has betrayed him. Naruto rises to protect Ranmaru, and punches Raiga off the cliff through successive attacks with shadow clones. Raiga realizes how Ranmaru could never be a truly free soul as long as he depended on him, and gives himself a funeral in one of his more coherent moments. As that arc comes to a close, Ranmaru becomes an apprentice at the Curry of Life shop.