Who is Guy Sensei in Naruto?

Guy Sensei in Naruto is Might Guy.

Might Guy (Guy Sensei) is the leader of Team Guy, consisting of Rock Lee, Neji Hyuga and Tenten. His team calls him "Guy Sensei" because he is the leader of the team and "Sensei" in Japanese translates to "Master" in English; meaning that they are calling him "Master Guy". Guy often refers to himself as "Konoha's Sublime Green Beast of Prey".

He is best known for his "nice guy pose", which consists of giving a thumbs up, winking, and smiling with teeth so white they give the proverbial "ping".

His birthday is January 1st, and he is 26-27 years old in Part I and he is 29-30 in Part II.