Jared Allen isn’t trying to be a leader. The Bears already have linebacker Lance Briggs and cornerback Charles Tillman for that.

So Allen prefers to sell himself as a new guy just trying to contribute, not as the Pro Bowl defensive end with the extroverted personality.

Still, Allen’s impact, only one day into training camp, is palpable. Teammates and coaches already are lauding his voice and locker-room presence.

‘‘Jared’s very consistent,” coach Marc Trestman said Friday after the first practice of training camp. “He’s a very likable guy in the locker room. He’s a fun guy to have a conversation with. When he’s out here, you don’t hear him. You see him. And he’s working.”

Have players responded to that?

“The guys would have to answer that question,” Trestman said.

OK, so what say you, Stephen Paea?

“[Allen is] getting after the young guys big-time — more than we had with [Julius] Peppers last year,” said Paea, the fourth-year defensive tackle. “We feel like we have another coach in the huddle, which is always good to have.”

It should be stressed that no Bear has criticized Peppers, who went to three Pro Bowls in his four seasons with the team before being cut after an erratic 2013. Peppers still is revered in his own way.

But the comparisons between Allen and Peppers will persist all year. It happens when one Pro Bowl player replaces another, especially within the same division. And the differences in personality are undeniable. Allen’s motor never has been questioned.