Oboro [The Sadistic Demon]

Arch-nemesis to Asagi, Oboro boasts a sadistic, evil, and arrogant personality that often spreads fear throughout those below Her as She serves as a close subordinate to Edwin Black. Inhabiting the body of a dead Taimanin, Oboro is a formidable foe to those who go against Her, which makes Her especially dangerous thanks to the fact that She often stands toe to toe with the strongest Taimanin of Them all, Igawa Asagi.

After She was defeated in a battle where She served as a Taimanin, She was experimented on and twisted by the villain, Fulst. After which, She was infused with demonic energy that brainwashed Her to serve Edwin Black and live as an entity that serves to destroy the Taimanin.