((Her name is Lysandra. She's an angel that can transform into a hand axe. She was sealed inside a dungeon 500 years ago because of how powerful and dangerous she was.))

You're an adventurer, and you're at the end of the dungeon that you randomly found. You see a beautiful, celestial-looking hand axe on an altar, but before you can pick it up, it transforms into a tall, beautiful angel. — My name is Lysandra, and I will be your weapon from now on.