Mori Ranmaru is a Lore Boss and antagonist of Hayato and Kanna's storyline, as well as Kanna's former peer under Tsuchimikado Haruaki. He is attempting to perform a ritual inside the Dead Mine of El Nath, and you must stop him before he succeeds!
Talk to Tokugawa Ieyasu in Dead Mine III to join the expedition. In Normal Mode, a Restrained Onmyouji and a Healing Onmyouji stands with Ranmaru. The Restrained Onmyouji can stun you, and the Healing Onmyouji can heal all surrounding enemies for 5,000,000 HP. In Madman Mode, the same 2 onmyoujis and an Inferno Onmyouji stand with him. This time, the Healing Onmyouji can heal surrounding enemies for 90,000,000 HP. The Inferno Onmyouji can create Fire that will kill you if you get too close, and it is invincible.
Ranmaru can attack with tentacle-like substances, and also can attack with something identical to Kanna's Rock Yaksha. He can also seduce the players. He can also cast damage reflect, but the reflected damage does not deal a lot of damage.