The twin brother could be a key factor in a new arc in the fanfiction. He might be kidnapped by a dark guild because of his connection to Gray. Then Gray and his friends would have to go on a rescue mission. Along the way, they would face many challenges and we would get to see different sides of the characters.
Well, if Harry Potter had a twin brother in fanfiction, it would change a lot. For one, Voldemort might have to deal with two threats instead of one. The twin could have different magical abilities or a stronger connection to certain aspects of magic. Their relationship with Ron and Hermione could also be different. They might split the group's attention, and new dynamics would form within the friendship.
The twin brother's character might be developed based on his past. If he had a difficult childhood, it could make him more reserved or cautious. But as he gets to know Naruto and Sakura, he starts to open up. He could start as a loner type, but as he gets involved in their adventures, he becomes more social and confident. He might also develop his character by exploring his own unique abilities and how they can be used for good.
Power and training. Since Goku is known for his power - seeking, his brother in fanfics often has a similar drive. They might train in unique ways or discover new forms of power.
Well, first of all, his abilities should set him apart. He could have a natural talent for genjutsu, while Naruto struggles with it. His personality traits can be explored in relation to Naruto. If Naruto is the sunny optimist, the twin could be the brooding type, with a darker sense of humor. His relationships with the other villagers would also be a factor. He might not be as well - liked as Naruto at first, but as the story progresses, he earns their respect in his own way. Additionally, his reactions to Naruto's fame and how he carves out his own identity within the shinobi world are crucial for developing his character.
A good way to create a compelling character for the twin brother is to make his powers have a cost. For instance, every time he uses a powerful Devil May Cry - style attack, it drains his chakra like in Naruto. This creates internal conflict as he has to balance when and how to use his abilities. Also, give him relationships that are complex, like having a love - hate relationship with a character from the Naruto world who is suspicious of his Devil May Cry powers, and at the same time, having a mentor - like figure from the Devil May Cry world who is trying to help him control his Naruto powers.
Naruto's life would change a great deal. He would no longer be alone growing up. There would be someone who truly understands him on a deeper level. They could train together, and Naruto might learn new techniques from his twin. Also, the villagers' perception of Naruto might change as they compare him to his twin. Maybe his twin is more well - behaved, which could either make Naruto feel pressured to be better or resentful.
As the story progresses, they could start to realize that they are stronger together. They might face a common enemy that forces them to work as a team. Through shared experiences like training together and fighting side by side, their relationship turns into a strong bond of brotherhood.
One possible plot could be that Naruto, as Goku's brother, has to learn the ways of ki while also maintaining his ninja skills. Maybe they team up to fight a common enemy that threatens both the ninja world and the Dragon Ball universe.
In Fairy Tail fanfiction, Gray's twin brother could be a really interesting addition. He might have similar ice - make magic, or perhaps a completely different power. This could lead to all sorts of new storylines, like rivalries between the two brothers or them teaming up against a powerful enemy.