Jetto Maruboshi

Jetto Maruboshi was renowned as Jinton no Jetto was one of the fastest shinobi in konoha.

Backround
He was a gifted member of the Maruboshi clan. He graduated at the age of six and was promoted to chunin the same year. He was made a tokubetsu Jonin at the age of Seven and became a jonin at age ten. His parents were killed by Iwa nin on a mission to Amegakure, this shocked him as he was sent to live with his grandfather kosuke.

His grandfather trained him from a young age and gifted him with specially crafted hookswords when Jetto told him he doesn't like hurting people. At age eleven he used DNA samples from Rai, Naka, Baru and Naori Uchiha to create an eternal mangekyo sharingan. This forced him to expand his chakra reservoirs to that of a tailed beast.

At age twelve he began teaching Naruto to expand his chakra reserves and ultimately saved Naruto from a group of villagers by scaring them of with a display of his hookswords to swing a villager as a mace into a nearby stand.

Personality
Jetto is described as a clone of his grandfather as he is very calm and collected in dire situations. He also seemed to show an intrest in genetics as he grew his own summon by engineering a massive summon known as the rabbit goddess. It appears as a large rabbit with a demonic head and a human like upper body complete with opposable thumbs and clawed fingers.