His sense of responsibility would likely increase exponentially. Since he now has the power to potentially change the past and shape the future, he would feel a great burden. This could lead to him becoming more of a strategic thinker, rather than just relying on his brute strength and determination. He would also have to deal with the moral implications of using his new powers, which would further shape his character.
Well, it could completely change the course of the story. For example, if Naruto travels back in time, he might be able to prevent certain events that led to Kaguya's power becoming so dominant. He could also use his knowledge of future events to train himself or others more effectively, thus altering the power balance in the ninja world much earlier.
His character would likely develop a sense of greater responsibility. With all that power from the bijuu, he knows he has to use it for good. He might become more serious and less of the carefree Naruto we know at first. He'd also grow in terms of his self - confidence, knowing he has such incredible strength.
In many time travel fanfictions, Naruto's character develops a deeper understanding of the ninja world. When he travels back in time, he sees the events and people that shaped his present world. This new perspective makes him more mature and strategic. For instance, he may realize the importance of certain historical events that he took for granted before.
Well, one possibility is that Naruto could use his newfound power of absorbing Kaguya along with the time travel ability to prevent some of the major tragedies in the Naruto universe. For example, he might stop the Uchiha massacre, which would change the entire course of the story. It could also lead to a different relationship between Sasuke and Naruto, as Sasuke's motivation for revenge would be gone.
Well, if Naruto absorbs Kaguya in a crossover fanfiction, it could drastically change the power balance. Naruto already has a lot of power, and adding Kaguya's abilities would make him nearly invincible. It might also change his relationships. His friends could be in awe or a bit scared of his newfound power. And it would surely change the way he faces future enemies. Instead of just fighting, he could potentially just overpower them with his new combined abilities.
In these fanfictions, Naruto often starts with his usual determined self. But as he travels through time, he has to adapt to the different social and political situations of the past. This makes him more cautious and strategic. For example, he can't just rush into battles like he might in his own time.
His understanding of the ninja world would expand. He might become more cautious and calculating in battles, as Kaguya's training could expose him to different strategies. Also, he could develop a more solemn side to his personality, considering Kaguya's own complex nature and the heavy knowledge she might share.
During the seventh time travel, Naruto could develop a deeper understanding of the power of friendship. Maybe he meets some old friends in a different context during his travels and realizes how important they are in a whole new way. For example, he might see how his friends' small actions in the past had a big impact on the future. This could make him more appreciative of them and also more determined to protect their relationships. He could also grow in his ninja skills as he has to adapt to different situations and opponents in the past, using his current knowledge to his advantage while also learning new techniques from the past.
The plot could start with Hinata in some kind of danger where Naruto tries to save her. During the process, an unexpected event causes Naruto to absorb Hinata. Then he has to figure out how to control the new powers he has gained. This could involve training with Kakashi or other experienced ninjas.
Naruto would likely become more empathetic. In a harem situation, he has to understand the feelings of multiple people. He would grow in his ability to handle complex emotions. For example, if one member of the harem is sad, he has to be there for her while also considering the feelings of the others.