Soramaru is the second eldest of the Kumō family. His elder brother, Tenka, entrusted him with the family's twin swords, which he practices with every day. Even throughout combat and practice, the swords remained in their sheath. Soramaru also struggles with the fact that he is weaker than Tenka, not being able to be recognized as a strong man who is worthy of protecting his household. He suffers from memory loss due to the childhood trauma of witnessing his parents' murder and nearly being strangled to death. This experience also causes him to develop an extreme aversion to having his neck touched. After Tenka's alleged death, Chūtarō's disappearance and Shirasu's betrayal, Soramaru's negative feelings causes his mental state to deteriorate and he eventually turns into the real vessel of the Orochi. Later, with Nishiki, Chūtarō and Tenka's help, Orochi is separated from Soramaru, with Abe no Sōsei's katana, and Chūtarō and Takeda's help, kills the Orochi once for all.
