In certain time travel fanfics, Tony Stark's character development is centered around his relationships. When he travels to different times, he meets his friends and loved ones at different stages of their lives. This can strengthen his bonds or make him realize how much he has taken them for granted. He may also form new relationships during his time travels. All these experiences reshape his character, making him more empathetic and better at understanding the people around him.
When Tony Stark time travels, especially to difficult times in history or the future, his character often develops in terms of his sense of responsibility. He might see the consequences of his actions on a larger scale. For instance, if he travels to a future where Earth is in a post - apocalyptic state because of some technology he created, he becomes more cautious and more committed to using his inventions for the greater good. He starts to think about the long - term effects of his actions rather than just the short - term gains. This transformation in his character makes him a more complex and relatable figure in the fanfic.