Kosuke Maruboshi

Kōsuke is a genin of Konohagakure, whom others called the Eternal Genin.

Backgound
Kōsuke had been a genin for over fifty years, thus the reasen others called him the eternal genin. During his time he had serverd under the Second, Third, and Fourth Hokage.

Abilities
Even though he is a genin, he was skilled enough to become a jonin. When he was younger the Second Hokage taught him many of his techniques, such as Water Release: Water Dragon Bullet Technique, and Water Release: Water Encampment Wall. He also learned the Shuriken Shadow Clone Technique from the Third Hokage. In his older years, he had a fake left leg, which when taken of would reveal a hidden blade. He was skilled with a sword.

Konoha History arc
He was placed on a team alongside Hayaman, Tekuno and Naruto Uzumaki to guard the borders of the village after Orochimaru and Sunagakure's invasion of the village