After watching her fath Anakin depart the ship, Leia's tension relaxed a bit. When she saw that they were leaving, however, she wanted to protest. And since on this ship, it was no use to raise a protest against anyone but the captain (and even then, your chances were slim), Leia got to her feet, intent on heading for the cockpit.
She hesitated only a moment, looking towards the man with the mask and the one with the scar. Her choice was left moot when Luke moved to Mantis, and Leia nodded, heading down the corridor to see the pilot.
But all protests died unspoken when she looked at him. Leia moved close, and settled her hand on his shoulder instead, staying quiet. This was no time to yell - she was too glad to see him. And too worried about the twins still locked in battle below.