Shinryu Shouken is a powerful Divine Beast of the Dragon Clan, originating from a different dimension. He possesses immense spiritual power and a long lifespan. Deep-seated animosity towards human exorcists defines his history, rooted in past conflicts where his kind were hunted for their valuable scales. This hostility drove him to a destructive rampage against the exorcist community.

Exorcists sealed him away for centuries as a consequence. When the seal weakened, he manifested partially. Seeking full release and revenge, he targeted Tanmoku Ki, recognizing the immense power within the spirit. A confrontation ensued, disrupted by Keika's intervention to protect Tanmoku Ki.

Critically wounded during the conflict, Keika's life was saved by Shinryu Shouken forming an unexpected spirit contract with him. This contract bound them together, granting Keika access to the Divine Beast's formidable power while imposing restrictions on Shinryu Shouken's actions, creating a forced partnership.

Resentment and pride initially defined Shinryu Shouken. He struggled with his subservient position to a human, frequently challenging Keika's authority and viewing the contract as a humiliation. However, the bond's necessity and shared experiences—facing common threats to the spiritual balance and Keika's earnest nature—gradually fostered a reluctant understanding.

His relationship with Tanmoku Ki shifted significantly. He moved from viewing Tanmoku Ki as a source of power or threat towards complex mutual respect and rivalry. He recognized Tanmoku Ki's strength and lineage, engaging in competitive banter and testing his limits. A deeper, unspoken bond formed, rooted in their shared connection to Keika and a mutual desire to protect him.

Shinryu Shouken's perspective broadened over time. Witnessing Keika's determination and compassion, and confronting threats endangering both spirit and human worlds, his rigid hatred towards exorcists softened. He began actively cooperating with Keika and Tanmoku Ki, utilizing his power for defense instead of destruction. Protecting Keika became a primary motivation, intertwined with his duty to maintain the balance between realms.

He embodies the pride and power of the Dragon Clan, displaying arrogance and a sharp tongue. Despite his gruff exterior and complaints about the contract, he demonstrates a fierce protective instinct towards those he acknowledges. His journey reflects a transition from isolation and vengeance towards reluctant integration and the formation of deep, unconventional bonds centered around his contracted partner and their allies.