Nightwing, whose real name is Dick Grayson, is the first Robin and one of Batman's former wards. In this story, he serves as a senior and veteran member of the Bat-Family, stepping into a clearly defined leadership role after the events of the previous film. His background as the original sidekick is established, and he now brings years of experience to the team. Personality-wise, Nightwing displays a lighter, more humorous side when among his fellow Bat-Family members, often using jokes and a teasing demeanor that positions him as an older brother figure to the other Robins. However, once the situation becomes serious in the Yakuza-controlled world, he becomes sharply focused and determined. His central motivation is to support Batman, lead the team when necessary, and serve as a moral anchor for the group as they confront a dark, altered reality. In the story, Nightwing is a key figure in coordinating the Bat-Family against the Yakuza League. He remains behind in Gotham alongside Red Hood and Red Robin to deal with invading yakuza before moving to the alternate Japan of Hinomoto. His role involves high-stakes infiltration, direct combat engagement with the Yakuza League’s lieutenants, and tactical coordination. He is frequently shown in a close working relationship with Batman, whom he assists in leading the team, and he maintains a strong tactical partnership with Red Hood and Red Robin. His relationship with Damian Wayne is particularly notable; he acts as a mentor figure and the eldest brother to the current Robin. Throughout the film, his development centers on his ability to lead in Batman's stead and his adaptation to the increasingly dangerous and surreal environment shaped by the Yakuza League’s criminal empire. In terms of notable abilities, Nightwing relies on his acrobatic combat skills, a hallmark of his fighting style. He uses a technologically advanced version of his iconic suit, which in this film includes a significant mecha upgrade that fits the anime aesthetic. He is also skilled in infiltration and strategic planning, making him a versatile asset who can both lead tactical operations and engage enemies directly.