Dick Grayson'

Dick is now Nightwing after five years. At 19 years old, he has improved in all his skills, as well as his personality has changed. As Nightwing he is serious, grave and calculating, more similar now to his former mentor, Batman. And he is appointed leader of The Team responsible for giving missions and forming teams.
Besides being serious and taciturn, Dick is also somewhat unfriendly and prefers solitude. He considered himself good at helping people until he realized that in order to help some people he had to seriously hurt others first.
Personality. While Nightwing is in many ways as serious and dedicated a crimefighter as his mentor, Batman, he is much more of a people person, being generally quite sociable and charismatic.