| Quote #1
JOAN: "Captain: you are to give me a horse and armor and some soldiers, and send me to the Dauphin." (1.50)
By ordering her "better" around, Joan's defying the submissive role that society has trapped her in.
| Quote #2
JOAN: "Then your [Dunois's] older and wiser heads are fatheads: they have made a fool of you." (3.33)
Joan in general has no respect for someone just because society says they're supposed to be in charge. She judges people on their individual merit.
| Quote #3
THE CHAPLAIN: "Your lordship knows very well that I am not attached to the soil in a vulgar manner, like a serf." (4.13)
Being connected with farm work is a sign that you're as low class as it gets.