"Your highness" is gender neutral.
So you know, if you’re ever confused about my pronouns.
alternatively, “your majesty,” “my liege,” and “supreme overlord”
please note that “your grace” is also acceptable
Mom: GO TO YOUR ROOM
Brother: that's not fair
Mom: DO AS I SAY.
Brother: You never send Lizzie to her room when she's in trouble!!
Mom: Lizzie never leaves her room. If she were in trouble I'd make her sit in the living room or go outside or talk to human beings.
Me: I CAN HEAR YOU.