Daniel "Dan" Kuso remains the central protagonist through the *Bakugan* series, including *Mechtanium Surge*. By this final season, he is approximately 17-18 years old and continues his partnership with his Pyrus Bakugan, Drago, now evolved into Fusion Dragonoid. Their deep bond faces severe strain due to Drago's uncontrollable powers, a consequence of energy absorbed from Code Eve during earlier events. This instability manifests through haunting nightmares of a gold-armored entity named Mag Mel and the accidental spawning of destructive Mechtogan like Zenthon during battles. These uncontrolled events cause significant damage in Bakugan Interspace and lead directly to Dan's disqualification from his top-ranked position following a loss to Anubias. This defeat erodes his confidence and strains his relationships with teammates Shun and Marucho. Initially resistant to advice about restraining Drago, Dan undertakes secret training to regain control. His impulsive tendencies resurface, causing friction when he misinterprets Shun's concerns as mistrust. The emergence of rival teams—Anubias's squad wielding Chaos Bakugan and Sellon's group exploiting Dan's vulnerability—further complicates his path. After Bakugan Interspace is destroyed in the conflict against Mag Mel (revealed as Emperor Barodius) and Razenoid, Dan relocates to the newly established Bakugan City in the season's second arc. Here, humans and Bakugan coexist, but new threats emerge: rogue Nonet Bakugan, feral Mechtogan, and the enigmatic Wiseman. Dan's combat role adapts to confront these escalating dangers. He temporarily partners with a Haos Bakugan, Reptak, forming the aerial Baku Sky Raider "Aeroblitz" alongside Reptak's original partner, Gunz. He also utilizes Battle Suits like the Pyrus Doomtronic and Haos Combustoid, supplied by allies Runo and Mira. His leadership is tested as he coordinates defenses against Wiseman's forces, culminating in a critical confrontation with the catastrophic Mechtavius Destroyer. In the finale, Dan, Shun, and Marucho harness the Current of Time to prevent the annihilation of Bakugan City and the deaths of their allies, cementing his legacy as a defender of multiple worlds. His appearance evolves across the season: the first arc features a red jacket with a high black collar over a white-and-blue T-shirt, jeans, a brown belt, and black sneakers with red soles and tongues. For the second arc, his outfit shifts to a red jacket with white shoulders, a black undershirt, dark red jeans, and similar footwear. During physical activities like jogging, he wears a black athletic suit with red trims. Personality-wise, Dan retains his core determination and love for Bakugan battling but demonstrates increased accountability for his actions. He reconciles with teammates after conflicts, accepts crucial help from former rivals like Spectra Phantom, and shows tactical adaptability against evolving threats. While still prone to stubbornness—such as refusing to bench Drago despite the risks—his journey emphasizes protecting others over personal glory, particularly evident in his efforts to safeguard Bakugan City's inhabitants and his ultimate sacrifice of resetting time to prevent tragedy.