Riddle is the protagonist of the story, an apprentice adventurer who endures a profound tragedy that reshapes the course of his life. His world and all his friends are destroyed by a mysterious and malevolent group known as the Box of Malice, leaving him in a state of utter despair. At the brink of losing all hope, he experiences a pivotal epiphany: the idea of turning back time to before everything ended. Driven by this singular thought, he endures a thousand years of existence, surviving through an unknown ordeal that transforms him into something of a monster. After this millennium of perseverance, he finally succeeds in traveling back to the past, armed with a young body that contains a thousand years worth of accumulated knowledge and experience.

His personality is forged in the crucible of this immense loss and determination. Having witnessed the ultimate destruction of everything he cared for, he is defined by a resolute and unwavering drive to alter the future. The story positions him as a great sage, a title earned not just through raw power but through the vast wisdom and battle-tested experience gained over his long and painful existence. He is a young man with the soul of a centuries-old survivor, carrying the weight of a failed timeline on his shoulders as he attempts to stop the calamity he knows is coming.

His primary motivation is singular and absolute: to stop the Box of Malice and prevent the annihilation of his world and his companions. This goal is the engine of his entire journey, transforming him from a despairing victim into a proactive and strategic agent of change. His role in the story is to be the architect of a new future, using his future knowledge to navigate past events and counter threats before they fully materialize. In terms of appearance, he is depicted as an adult male with yellow eyes and gray hair that reaches to his ears. He is often seen wearing a coat and has spiky hair.

Regarding key relationships, one of the most significant figures in his life is a character named Norn. She represents a complex emotional anchor for him, described as both a source of hope and a cause of suffering. This duality suggests that their bond is central to his emotional journey, possibly being a relationship that ended in tragedy in the original timeline and which he now seeks to protect or mend. His development is thus intrinsically linked to his actions in the past, as he interacts with people he once lost. The central arc of his growth involves learning how to apply his immense knowledge not just to fight enemies, but to navigate personal relationships and avert the specific tragedies that scarred him. His most notable ability is his mastery of time manipulation, specifically the power to reverse his personal timeline and retain his memories and expertise across the journey. Complementing this is the vast pool of knowledge he accumulated over one thousand years, which makes him a tactical genius and a formidable force despite his youthful appearance.