Abe no Sōsei commands the Yamainu Squad as its stoic captain, leading the government’s pursuit of the Orochi’s vessel. Born to a lineage of master exorcists, he was severed from his family at birth and reared in solitude—deprived of toys or companionship—forging his reserved nature and sparse social aptitude. Identified early as a candidate for the Orochi’s vessel, he trained under Taiko’s tutelage before rejecting his pawn-like destiny upon embracing Tenka Kumō’s aspiration to become a national hero.

He carries the ancestral sword of the Abe clan, a legacy spanning generations, and mentors Soramaru Kumō in swordsmanship, honing the youth’s combat prowess. His childhood bond with Tenka Kumō and Kiiko Sasaki reshaped his worldview, transforming rigid duty into loyalty toward shared ideals.

Notable moments include counseling Soramaru on embracing vulnerability, framing tears as strength in grieving, and challenging Tenka’s solitary leadership, exposing its inherent loneliness. These exchanges unveil his perceptive grasp of emotion beneath an austere exterior.

Standing 174 cm tall and weighing 59 kg, with blood type A and an October 25 birthday, he balances discipline with quiet quirks: a stamp-collecting hobby, a taste for karashi renkon, and disdain for trivial chores and wasabi.

His journey traces a path from solitude to solidarity, propelled by ties to the Kumō brothers and a redefined purpose transcending fate’s confines.