Ghost of Yōtei and the Black Fanged Oni

Born under a blood moon, Kuroshi Akumu Sakai, younger brother of Jin Sakai, was marked from birth by his glowing red eyes-an omen whispered to signal a demon's wrath. Feared and isolated, he was exiled by Lord Shimura, who saw darkness growing in the boy.

Alone, Kuroshi was taken in by the Kurayami-no-Mure, a clandestine clan of ninjas and assassins. There, he mastered stealth, forbidden arts, and psychological warfare, transforming into a weapon of relentless precision and lethal efficiency. Honor was discarded; only results mattered.

When the Mongols invaded Tsushima, it was Kuroshi-not Jin-who killed Khotun Khan, though history erased his deeds. Tsukuyomi-no-Mikoto then offered him a choice: live as a mortal, or bear a curse of slowed aging to hunt evil souls. He chose vengeance, becoming the Black Fanged Oni, feared across the lands.

In 1587, Lord Saito and the Yōtei Six murdered Master Kengo and his wife, Yone. Kuroshi saved Atsu and her twin Jubei, sending them to safety. Sixteen years later, he would reunite with Atsu, stepping from the shadows to guide her and exact vengeance-a ghost of wrath, moving like water and striking like a storm.