Jinzō Ōtori.

Jinzō Ōtori, born into the Ōtori clan as its only remaining member. Jinzo is a quiet soul, preferring silence and lonliness over crowds and commotion. He is the only Shinobi who possess knowledge of Mercury release, his clan's special nature release type. His parents trained him in the ways of metal before their death, bestowing this knowledge onto him to pass on to his son or daughter. As a Jonin and an ex Ronin, he serves whoever needs it, living or dying by his sword.