She has a reputation that 'commands' attention/respect. [=people give her respect/attention because of her reputation]
In the United States, the President as the commander in chief is at the head of the military 'chain of command'.
She seems to be 'in (full) command of' the situation. [=she seems to have complete control of the situation]
(..) Now let's say I threatened to hit you unless you shut your mouth, but you kept talking. - What do you think I'd do? - I don't give a rat's... I'm here by the king's command to take back this castle. Have him bathed and fed. Unless you'd like to take his place. Apologies, Ser Jaime. Do as he says. (..)2016 TvShow: Game of Thrones Title: The Broken Man Season: 6 Episode 7
(..) You have better instincts than any officer in the Lannister army. That's like saying I have a bigger cock than anyone in the Unsullied army. I expect to command all the Lannister forces before long. You can be the right hand I lost. You promised me a lordship and a castle And you'll get all three. (..)2016 TvShow: Game of Thrones Title: The Broken Man Season: 6 Episode 7