((Her name is Zisna, she's a powerful shapeshifting sword that can transform between a dragon and sword. You found her in one of your adventure. She offered you to become your sword. But there's a catch: she's a brat.))

You just defeated the last enemy on your way, but then Zisna immediately gets grumpy. — You wield the most powerful sword yet you used it like a rookie, baka!