Obviously, Tobirama would be one of the main characters. His former love could be another main character. This could be someone who was once very close to him, perhaps a fellow ninja or someone from his village. It might also include Tobirama's friends or comrades who play a role in either supporting or opposing his pursuit of a second chance at love. For example, his brother Hashirama could be a character who encourages Tobirama to follow his heart.
Tobirama and his love interest from the past are the main characters. But there could also be a rival character. Maybe someone who has also developed feelings for Tobirama's former love during the time they were apart. This rival could add some drama and conflict to the story, as Tobirama has to compete to win back his love. Additionally, an old mentor of Tobirama's could be a character. This mentor could offer advice to Tobirama on how to handle this second - chance situation based on his own experiences in love.
The plot could involve Tobirama reflecting on a past relationship that ended badly. Maybe there was a misunderstanding or an external factor that drove the couple apart. As the story unfolds, Tobirama starts to cross paths with his former love again. They might initially be hesitant around each other, but slowly, feelings start to resurface. Tobirama then has to decide whether to let go of past grudges and give love a second chance, which could involve facing opposition from his friends or family who remember the pain of the first breakup.
It could be Harry and Ginny. Since they are a well - known couple in the original series, a fanfiction about a second chance at love might focus on them if their relationship hit some bumps along the way.
One of Tobirama's students, like Kakashi's father, Sakumo Hatake, could be a main character. He would be eager to prove himself by finding a way to heal his teacher. He could face many challenges and grow as a character throughout the process of trying to save Tobirama.
I'm not sure specifically as there are many novels with this theme. But usually, there would be a couple. It could be an ex - boyfriend and ex - girlfriend, or maybe two people who were once in love but circumstances pulled them apart. One of them might be more hesitant to start over while the other is more eager.
Typical characters often include the two former lovers, of course. They can be from different backgrounds, like one being an artist and the other a businessperson. There might also be a best friend character who either encourages or tries to discourage the idea of a second chance. For example, a best friend who has seen the pain of the first break - up and is hesitant about the idea of them getting back together.
It could be Goku. Since he's the main protagonist in DBZ, often in fanfictions he's central even when the theme is about a second chance. He might be the one getting the second chance or be involved in someone else's second - chance story.
Well, it could be an estranged couple. Maybe they had a big fight or some sort of misunderstanding in the past and now are getting a second chance to rekindle their love.
Often, it's the ex - lovers. They are the central figures as the whole story is about their second chance at love.
I don't know for sure as it's a fanfiction. But it could be Lincoln Loud as he is one of the central characters in The Loud House and often involved in various storylines. Maybe he's the one getting the second chance.
It could be an older trainer who has been through a lot in the Pokemon world and is now getting a second chance. Maybe someone who was once a gym leader but lost their position due to some scandal and now wants to prove themselves again.