Head Ninja of Kumogakure

Background
As from Kumogakure, this man came to Konoha to sign a peace treaty between the two nations 9 years previously. This man and the Lightning Country had used the peace treaty signing as pretext to gain free entry into Konoha to abduct a member with the powerful Hyuga kekkei genkai—Byakugan. During the middle of the night he snuck into the Hyuga clan household and abducted Hinata while she slept. Hinata's father Hiashi Hyuga interrupted him during his escape and quickly dispatched him.

Trivia

 * As the current Raikage wondered why Konoha hadn't killed Sasuke, a traitor to Konoha, when they killed Hizashi Hyuga whom he thought a traitor, this could mean that the Hyuga incident wasn't actually planned by Kumo. As such, it is speculated that this head ninja is working for some other forces.