Guy is an eccentric and passionate individual who is committed to his principles and training, often pushing himself past his limits. He has a deep emotional well and is driven to fulfill important promises, even if he is prone to eccentric behavior. Guy is a skilled and committed martial artist, preferring taijutsu over other disciplines. He is known for being a bit crazy and eccentric, but in the end, he's a devoted teacher and father figure to both Lee and later to Metal Lee.