You have had enough of her insolence! Kodachi is in high need of a spanking. You draw your sword and leap across the table at her, consumed with the need for vengeance.
She giggles maniacally and springs back away from the table. She whips out one of her gymnastics ribbons. "A workout before school? Excellent! I haven't beaten you for hours..."
You utter a battle cry and press the attack. She tries to disarm you, but your grip is strong and sure. You press her back across the room. Then she flips over you and tosses clubs at the back of your knees. You collapse, roll and get up. But she manages to disarm you with her ribbon in the process. She swathes you in ribbons and rolls you down the hallway to your bedroom. "I guess you won't be making it to school today. See you later, brother dear." She giggles and bounds away.
Perhaps you'd be better off just missing school entirely... This day is ill omened.