TV-Series
Description
Tasuku Ryūenji is a key figure in the *Future Card Buddyfight* narrative, playing a major role in the *Triple D* season. His background is marked by "The Disaster," a traumatic event where he lost his family and was rescued by the Buddy Police. This forged his belief that adults shelter children excessively, fueling his drive to prove self-sufficiency and contribute to justice. He joined the Buddy Police young, rising to become a high-ranking officer renowned for exceptional Buddyfighting skills and a strong sense of duty.

During *Triple D*, Tasuku takes temporary leave from the Buddy Police to focus on studies at Aibo Academy but actively participates in the World Buddyfight Championship (WBC Cup). He mentors participants like Gao Mikado and Bal Dragon, identifying a hidden ability within Bal that attracts antagonists such as Kyoya Gaen. His Buddy Monster, Star Dragoner Jackknife, serves as both partner and mentor to Bal, reflecting Tasuku's supportive nature. Their profound bond, characterized by mutual sacrifice and familial loyalty, is tested yet strengthened through shared challenges.

Tasuku's arc includes a fall from grace when Kyoya Gaen corrupts his sense of justice, leading him to join the villain group Disaster as the "Purgatory Knight." He adopts a Darkness Dragon World deck, allies with Demios Sword Dragon, and embraces a cynical worldview where adults cause societal problems and children are powerless. This culminates in intense self-loathing and a near-permanent rift with Jackknife. After regaining his senses, Tasuku wrestles with deep guilt and shame over his actions. Jackknife's unwavering support enables his redemption, though residual guilt persists.

In *Triple D*, Tasuku unlocks the "Dragon Force of Joy" ability, triggered by tears of joy during a critical reunion with Jackknife in episode 29. This evolves into "Style of Justice," enhancing his combat with crystalline features and luminous effects. His strategic fighting style contrasts with Gao Mikado's impulsive approach. He forms an unexpected partnership with Gaito Kurouzu, where Tasuku's calm rationality complements Gaito's intensity, showcasing Tasuku's adaptability and leadership in their tag-team efforts.

Beyond *Triple D*, Tasuku resumes Buddy Police duties, eventually ascending to the rank of Commissioner in *Future Card Buddyfight Ace*. His journey reflects ongoing themes of atonement and maturity, balancing inherent kindness with the responsibilities of his role.