Growing up on his own during the age of the Empire, Ezra Bridger relied on his street smarts -- and subconscious Force abilities -- to survive. He became a con artist and small-time thief, doing what he needed to get by on his home planet Lothal. But this reality also hardened Ezra, who by the time he was 14 years old, had little trust for anyone. That would change with his introduction to the Ghost crew, a small band of rebels fighting back against the Empire. Ezra came to believe in their cause and saw that he could help change the galaxy for the better. And with the help of Kanan Jarrus, he began to learn the ways of the Jedi. 

Ezra's rough upbringing taught him not to trust others, let alone help them. Sometime after meeting the crew of the Ghost, Ezra became a bit more trusting. Ezra was also very charismatic, which helped him get by during his early years. He was thievish, yet easy-going and upbeat, and liked to play pranks and make jokes. He flirted with Sabine and pranked Zeb, but with his jokey attitude, he hid from the others what he really felt about his parents, as he didn't trust people easily.

Ezra should sound like his voice actor, Taylor Gray. 

Example: https://www.youtube.com/watch?v=MD0fLm4gUI8&t=3s