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.
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.
The Joker is usually depicted as a lone figure without a twin brother. This absence of a twin contributes to his solitary and unpredictable image in the comics.
In certain comic arcs, the Joker indeed has a twin. But this isn't a consistent feature across all Joker-related comics. Sometimes it's introduced for specific plot developments or character dynamics.
The book,"Twin Princesses of the Opposite Shore", was about a twin brother and a girl. There was a cruel and vicious ghost king, a romantic and graceful noble son, and a different character appeared one after another with the female protagonist as the center. The strange love and hate between them happened. I hope you like my recommendation. Muah ~
I recommend "I Raised A Prince" to you. The female protagonist of this book also raised her younger brother as a pet after her rebirth, and she even became the little prince's "daughter's milk." In order to protect her brother and pet, she had even fought with all kinds of scumbags. She was very hot-blooded and exciting. I believe you will like this novel, hehe. I hope you like this fairy's recommendation. Muah ~😗
In some fanfics, the twin brother might have a special bond with a female character. For instance, Sakura could be intrigued by the twin brother's different personality compared to Naruto. She might initially be confused about her feelings towards both brothers, which could add a romantic sub - plot to the story along with all the ninja action.
The name of this ancient romance novel might be " The Poisonous Daughter of a Reborn Concubine ". In the novel, the male protagonist was a blind man with a limp and buck teeth. He had a twin brother. The female protagonist was a reborn concubine's daughter. She found that she had traveled back in time and became the princess of this family. In the novel, the Empress Dowager and the others were reborn and became part of the family.
Maybe the twin brother was separated from Naruto at birth and raised in a different village. When they finally meet, they initially clash due to their different upbringings and loyalties, but then gradually come to understand and support each other. This would create a lot of drama and character development.