Jiang Zhi Wei felt like she was in a dream. She never imagined herself facing Manjushri in reality. As a devout swordswoman, she was extremely excited to meet a figure in mythology, especially someone like Manjushri and her sword of wisdom!
It was very dangerous to fight against such mighty people. Jiang Zhi Wei thought she had no chance to defeat him. Even though his real spirit already disappeared and it's only a golden body now, she did not think she was that powerful to defeat any enemy in this long journey. This was a game, not reality.
It's hard to achieve the status of "only me in this world" if one only focus on his own sword and his enemy.