[Leia probably doesn't know this, but Ezra's not that bad at mimicking other people's voices. He draws himself up and deepens his voice, adding sternness to it for good measure.]

You lack discipline and focus, Ezra. If you'd been doing what you were supposed to be doing, this wouldn't have happened at all. Now start over, and remember to focus.

[He drops the act, reverting to a normal, if slightly grouchy voice.]

Like it's easy to focus with Chopper throwing food cans at my head.