Raiko Minamoto emerges as a legendary warrior rooted in 9th-century Japan, entwined in tales of supernatural strife. In one chronicle, he embarks on a perilous mission to vanquish the demonic entity Shutendoji, crossing paths with allies Jiro Shutendo and Miyuki Shiratori. His relentless pursuit of eradicating supernatural threats leads to a climactic clash against Shutendoji, where he meets an uncertain fate approximately 1,000 years before later events unfold.

A separate saga casts him within a formidable alliance opposing Oni forces, fighting alongside figures such as Sakata no Kintoki and Watanabe no Tsuna. This iteration pits him against Abe no Seimei, a manipulative antagonist orchestrating Oni-driven chaos, and culminates in Raiko’s confrontation with the Four Heavenly Kings—elite adversaries central to Seimei’s schemes. His final stand results in defeat and an implied demise, concluding his active role in the conflict.