His confidence might increase. Since he already knows what's going to happen, he would be more self - assured in his actions. For example, he wouldn't be as intimidated by Snape.
Ron would probably become more responsible. Knowing the consequences of certain actions, he would be more careful. He might take on more leadership roles among his friends, instead of just following Harry. He would also be more aware of the importance of time, and not waste it as he did before.
Well, if Draco goes back in time, he might become more humble. Seeing the past and the mistakes his family has made or is about to make could make him less arrogant. He would realize that his pure - blood status doesn't give him the right to look down on others.
Azula could become more empathetic. In the original timeline, she was quite ruthless. But going back in time and seeing things from a different perspective might make her more understanding of others. For example, she might see how her actions affected her family and friends in the long run, and this could change her approach to relationships. She may also be less arrogant as she now realizes that her previous self - assurance didn't always lead to success.
Well, he could change a lot of things. Maybe he would prevent some bad events from happening at Hogwarts. For example, he could stop a certain prank that went too far. He might also use his knowledge of the future to help his younger self in school, like getting better grades in Potions.
His Force abilities could be different. Maybe he would discover new aspects of the Force in the past that were lost in his original time. For example, he could learn ancient Force techniques that were forgotten over time.
If Ron goes back in time, he might have a chance to see Hermione in a new light. Maybe he realizes her importance earlier and becomes more protective of her from the start. This could lead to a more mature and deeper relationship developing faster than in the original timeline.
His relationship with Kakashi would also change. Naruto could use his Rinnegan - enhanced knowledge to help Kakashi deal with his past traumas earlier. He might also show Kakashi new jutsu or ways of combat that he learned in the future. This would make Kakashi see Naruto in a whole new light and their bond could become more of a teacher - student relationship in reverse.
With his Slytherin peers, Draco's relationship would shift. He might encourage them to be more inclusive and less focused on pure - blood supremacy. This could make him an outcast among some of the more traditional Slytherins, but also gain him new allies who are open to change.
His relationship with his father, Ned Stark, would be different. He could finally have a real father - son relationship instead of the hidden one. He might be able to learn from Ned and become an even better leader in the North.
His relationship with Katara would be very different. He might be able to approach her in a more confident way, knowing what they've been through in the future. He could also avoid some of the misunderstandings that happened between them in the original timeline.
His sense of purpose might also change. In his original time, he might have been fighting for a certain cause. But in the past, he could discover new things to fight for or new values to uphold. Maybe he realizes the importance of preserving certain aspects of the past that were lost in his future, and this changes his overall attitude and personality as he becomes more of a preserver than a fighter in some ways.