Shinku Yūhi

He is a shinobi from Konohagakure.

Background
During the Nine-Tails' Attack on Konoha, Kurenai's father was seen placing the young shinobi inside a barrier, informing them that they were to stay out of the fight against the Nine-Tailed Demon Fox, to which Kurenai voiced her discontentment. He told his daughter that she was a shinobi who may or may not live a long life, and requested of her that she live long enough to give him a grandchild that the Will of Fire could be passed on to.

Appearance
Like his daughter, he had dark hair and very distinctive ringed eyes. He also wore the standard Konoha shinobi outfit with what appeared to be slightly longer sleeves than usual, shinobi sandals, his forehead protector that he wore like a bandanna, and a flak jacket. He also carried a sword strapped vertically over his left shoulder and a small cylindrical object strapped to his right lower back.

Trivia

 * Kurenai inherited her distinctive eyes from her father.