Dan Kuso drives the *Bakugan* anime series as its central protagonist, including the final season, *Mechtanium Surge*, where his character faces distinct challenges and evolution. Beginning as a passionate yet impulsive brawler partnered with the Pyrus Dragonoid Drago, Dan initially relied on brute force. Conflict with Drago and defeats by rivals like Ryo spurred his growth into a strategic top-ranked brawler across Earth, New Vestroia, Vestal, Neathia, and Gundalia. Early traits included overconfidence and frustration during downtime, maturing by *Gundalian Invaders* where he displayed leadership during crises like the Gundalian invasion. Key relationships involved his rivalry-turned-alliance with Spectra Phantom, his childhood bond with Shun Kazami, and romantic tension with Runo Misaki, culminating in a date without a formal relationship. In *Mechtanium Surge*, Dan sported updated designs. Arc 1 featured a red jacket with a black collar and shoulder pads over a white and blue T-shirt, jeans, a brown belt, and red-soled black sneakers, plus rectangular goggles. Arc 2 introduced a red jacket with white shoulders and dark red jeans with similar sneakers. A separate black sporting outfit with red trims appeared during jogging scenes. **Arc 1: Power Instability** saw Drago develop unstable powers threatening Earth after exposure to Code Eve, inadvertently spawning the destructive Mechtogan Zenthon and causing damage in Bakugan Interspace. Dan's attempt to suppress Drago's energy during a match against Ben (Team Anubias) resulted in loss of control, destroying the arena and drawing scrutiny. A decisive defeat by Anubias led to public shunning and Dan's disqualification from his #1 ranking. Conflicts flared with Shun and Marucho over his brawling hiatus, straining teamwork. To regain synchronization with Drago, Dan sought retraining in New Vestroia. He later allied with Spectra Phantom and former enemies to confront the Chaos Army and Mag Mel, ultimately taming Zenthon. **Arc 2: Bakugan City Crisis** began after Bakugan Interspace's destruction, with Dan helping establish Bakugan City for human-Bakugan coexistence. This peace shattered as rogue Mechtogans and Nonet Bakugan from the Doom Dimension, allied with Wiseman, attacked. Dan temporarily partnered with Haos Reptak (later reuniting it with Gunz) and utilized Battle Suits like Pyrus Doomtronic. He formed the Baku Sky Raider "Aeroblitz" with Reptak and the Mechtogan Destroyer "Dragonoid Destroyer" to counter threats like Mechtavius Destroyer. Runo Misaki returned, aiding in Battle Suit deployment and partnering with Haos Aerogan. The season concluded with Dan, Shun, and Marucho using the Current of Time to prevent Bakugan City's annihilation and avert ally deaths. Personality-wise, Dan's recklessness resurfaced due to Drago's instability, causing friction with Shun and Marucho over his stubborn refusal to stop brawling. His determination to protect others fueled his New Vestroia training and Bakugan City defense. Loyalty remained core, evident in reconciliations with allies and offering second chances to antagonists like Team Anubias. His bond with Drago deepened through shared power struggles, while interactions with Runo persisted unresolved.