If he travels through time often, he could become more world - weary. He would see different eras and the problems in each. This might make him more determined to make a positive impact in the Titanic's timeline. He could also develop new skills from the different time periods he visits, like learning new languages or survival techniques. All these experiences would shape his character in a more complex way.
One possibility is that he travels to different time periods related to the Titanic's history. For example, he might go back to the building of the ship and make sure it was constructed more safely. He could also interact with the people who planned the voyage and change the fateful decisions that led to the tragedy. In a time travel fanfiction, the sky's the limit for his adventures. He could even meet his future self or ancestors and gain new insights about his own life and family history.
Perhaps the fanfiction could center around Officer Lowe falling in love with a woman who was on the Titanic traveling with her family. He saves her during the evacuation process. Their eyes meet, and there's an instant connection. As days pass while waiting for rescue, they get to know each other better. Lowe starts to dream of a life with her, away from the horror of the Titanic sinking. He might have to fight his own insecurities about being worthy of her love, considering the trauma they've all been through.
The love interest could be a young nurse traveling to America to start a new job. She has a caring nature, which attracts Officer Lowe. During the rescue operations, she helps the injured, and Lowe is impressed by her skills and compassion.
If Khal Drogo time - travels, his character would likely become more open - minded. In his own time, he was used to a certain way of life. But traveling through time would expose him to different cultures and ideas. For example, if he travels to a modern society, he would see equality between genders, which is very different from his own world. This could make him question some of his beliefs and grow as a character.
If Hollow Ichigo time travels, his character could develop in many ways. He might gain a new perspective on his relationship with Ichigo. For example, seeing Ichigo's past struggles and how he has always been there, even if in a negative way, could make him more empathetic. He could also develop new powers or abilities from the different time periods he visits. Maybe he absorbs some ancient Hollow or Soul Reaper energy that changes his form and capabilities.
If Aizen time travels, his character could develop a sense of regret. Maybe seeing the destruction he caused in the future makes him want to change his ways in the past. He might become more empathetic towards others as he realizes the full impact of his actions.
If Levi travels back in time, his character could develop more compassion earlier. In the original timeline, he had to go through a lot of hardships to become more empathetic towards his comrades. But if he goes back, knowing what he knows now, he might start showing more care from the beginning. For example, he could be more patient with new recruits instead of his usual tough - love approach.
His character could develop a sense of purpose beyond his personal vendetta. When traveling through time, he may encounter situations that require him to protect the timeline or prevent catastrophic events. This would shift his focus from just his own past and present grudges to a more global view of the world he inhabits. He might start to think about the long - term consequences of his actions for the entire universe.
If Sauron time travels, he might become more desperate. For example, if he travels to a time when his power is waning, he'll be desperate to regain his former glory. This could make him take more risks than he usually would.
Orochimaru's character would likely become more complex. He might start to question his past actions if he sees the consequences they had in the future. For example, if he travels back to a time when he was just starting his unethical experiments, he could see how those actions led to the destruction or harm of certain things in the future, and this could make him more hesitant or even try to change his ways. Also, if he meets important people from his past in a new light during time travel, like his old mentors or comrades, his view of relationships might change.