Biographical Information
Name Zephyrus
Blessing Divine Protection of the Labyrinth
Title(s) Fire Hell Dragon King
Species True (Fire) Dragon King
Evolution Dragon King
Adult Dragon
Professional Information
Affiliation Tempest
Ramiris’ Labyrinth
Post Guardian of the 99th floor
Debut Information
Manga Debut Chapter 101(mentioned)

Chapter 164(actual)

"Fire Hell Dragon King" Zephyrus ["炎獄竜王" ゼピュロス, "Engoku Ryuu Ou" Zepyurosu] is a True Dragon King and the Guardian of the 99th floor of Ramiris’ Labyrinth.


Dragon - 20m dragon (assumed)

Dragon King - 20m dragon (assumed)

True Dragon King - Beautiful Humanoid form


The dragon is an fire dragon.

Milim brought an adult fire dragon dungeon that she tamed, where it guards the 99th floor of the Labyrinth. It was allowed to make a nest and it feeds off of Veldora's aura for food.

From fighting in the labyrinth and absorbing Veldora's aura the dragon evolved into a dragon king class.

The dragon was granted a name by Ramiris and Rimuru gave them 5000 souls, which allowed it to evolve into a True Dragon King. Upon its evolution it obtained a humanoid form, which is different from Milim's draganoid form in that Milim is a Spirit Form species, while the Dragons are a corporeal species that have changed form (they are bound to their bodies). Though it had equal stores of energy to the Ten Lords of the Labyrinth, but had lower fighting prowess, and thus decided to train in its new body.


Fire Elemental Control

Evolution Edit

ch Evolution Stage Trigger for Evolution Rank EP New Skills/Abilities


Adult Dragon Collected by Milim A Battle Physical attacks with fangs and talons

Elemental attacks - Fire

146 Dragon King Veldora Aura and Fighting
164 True Dragon King Name by Ramiris

5000 souls by Rimuru