Let Dahaka, whose full name is Java Let Dahaka, is a sentinoid belonging to the Dragon Race, a group of dragon-like beings who reside in the Mystic Realm. He initially appears in the story as an antagonist, serving as one of Demon Card's Palace Guardians. In this role, he is a formidable martial artist who seeks out powerful opponents to fight, driven by a desire for combat rather than any deep allegiance to the organization's cause. His first encounter with the protagonist Haru Glory ends in his defeat, a loss that opens his eyes to a different path. After being shown the way of justice, Let renounces his former allegiance and joins Haru as a member of the Rave Warriors. His motivation shifts from a simple love of battle to a sincere hope of bringing peace to the world. Over the course of the story, Let undergoes a notable physical transformation as well: when he first appears, he has a humanoid body with a lizard-like face, but after performing the Dragon Trial during a fight against Jegan, he takes on a fully human appearance. As a Dragonrace, he is a skilled and powerful martial artist, and his knowledge of the world beyond his home realm proves valuable to his companions. He develops a close bond with the other Rave Warriors, especially Haru, and he even adopts a nickname for the creature Plue, preferring to call him Sabutaro. Let's character arc is one of redemption and growth, evolving from a villain driven by aggression into a loyal and honorable ally.