The Seventh Neck (Nana no kubi), is the sole Orochi capable of resisting total corruption. Sōma stands as the lone guardian for Himeko and Chikane throughout most of the series, eventually contributing to the downfall of the Orochi. He enjoys a high social status at their school, on par with Chikane's, and many students assume they are in a relationship, though in reality, they seldom interact until the Orochi events unfold.
Similar to Chikane, he is deeply in love with Himeko and fiercely protective of her, battling relentlessly to ensure her safety until he succumbs to the Orochi curse and is incapacitated. Fortunately, he is later saved by his brother Tsubasa.
