Eiku Shizuma  

, 閑馬永空

An immortal swordsman, gifted with blood-worms like Manji, seeks to ally with him to overthrow Anotsu. He received his weapons, a poisoned dagger and saber named Inoue Shinkai Kosatsu, during the Muromachi period, making him two centuries old. He first appears in Conquest part 1, is mentioned in Cry of the Worm part 1, and later killed by Manji in Cry of the Worm part 3. The poison he used (Kessen Satsu) was later employed in Trickster to try killing Manji.