Guren

Guren (紅蓮) is an area guardian of the River of Flame on the seventh floor of the Great Tomb of Nazarick.

Appearance
Guren is a a giant abyssal hellish slime that hides its body in the lave.

Background
When Demiurge is absent, Guren guards the 7th floor in his place.

The Two Leaders Arc
Aura mentioned to Albedo and Shalltear that if intruders are able to past her floor they would still need to past Guren's area on the 7th floor if they plan to harm Ainz.

When Mare and Pulcinella were having a chat, Mare asked how Guren was doing. He said that if he wanted to send a message back, he might need to relay to Guren but he doesn't know what he's doing and where he is. Pulcinella informed Mare that the last time he saw Guren was when Demiurge wasn't present and he was lying in ambush around the 7th floor's gate.

Abilities and Powers
Though its level is 90, Guren's class build is optimized in battle and can overwhelm some weak floor guardians. Guren usually hides its body in the lava, forcing the enemy to fight in a battle field favorable to it.

Demiurge
Guren is Demiurge's subordinate. Guren guards the 7th floor in Demiurge's place when he is absent

Trivia

 * In the English publication of the Light Novel, Guren name was changed to Crimson.
 * His name "Guren" means red lotus. "Guren Hell" in Buddhism is a hell with harsh, cold winds that causes frostbite, causing the sinners to bleed like red lotuses.