When Naruto rescued Sakura she was surprised like she saw a ghost! The reason she was so surprised was because she knew Naruto could kill her, why? Because she sensed Naruto ginormous sage chakra. You can't see the pigments on his eyes because he merged it with his normal chakra so he can have sage mode 24/7.
TL;DR Sakura was deathly afarid of Naruto because he had so much chakra cuz he had hidden sage mode on.
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TL;DR Sakura was deathly afarid of Naruto because he had so much chakra cuz he had hidden sage mode on.