Well, it could be due to a powerful enemy attack during a fight in Wave. Maybe an enemy with a sharp weapon or some dangerous jutsu managed to strike Naruto's eye.
Well, one possible plot development could be that it makes her more determined. Losing an eye might be a turning point where she decides to train even harder to overcome her disability. Maybe she starts to focus more on her other senses, like Naruto in the original series focused on his sense of smell when his vision was blocked. It could also lead to some interesting interactions with her friends. They might be overly protective at first, but she would prove to them that she's still the same strong - willed person.
Sure did. Thor's loss of an eye is a key development that adds depth to his character and story arcs in the comics. It often symbolizes his growth and sacrifices.
She would probably have an eye patch, which would give her a more rugged and battle - hardened look. Her overall expression might become more serious, as the loss of an eye is no small thing. The remaining eye would likely become more intense, as if it has to make up for the loss of the other one.
Odin's loss of his eye was a significant act. He did it to gain profound wisdom and insights. This sacrifice was part of his journey to become a more powerful and knowing deity.