He has no surname. He is a golem created through alchemy, fueled by blood and dead flesh, to serve as a berserker for the Empire. Named "Flash that Rips the Night," he eventually achieved numerous military feats and came to be hailed as a "Hero." However, the stench of blood and death always followed in his shadow. After the death of the King who was his contractor, he was feared by the people and sealed away by mages. In a dark, cold, and starving void, he was awakened by the blood of a baby descended from his creator. After slaughtering everyone in the baby's clan except for her as a "favor" for his awakening, the monster regains his power and decides on a whim to become the baby's god. Thus, the golem who knows nothing of the human heart begins a journey with the infant. It may well be a journey that sets the world ablaze. He is a beautiful man with long silver hair like moonlight and blood-red eyes. A hedonist who finds supreme happiness in living on the battlefield and drinking blood. Having formed a master-servant pact with the protagonist after the massacre, the protagonist is effectively his Master. Because his body is woven from blood and carrion, those are his primary diet, though he is capable of eating human food.

A homunculus whose seal was broken by Guest after Nachtstrahl discovered his sealing monument during their travels. A combat-type homunculus created by a disciple of the Great Alchemist who made Nachtstrahl; none can surpass him when he draws his bow. Though a highly skilled youth, he suffers from extreme self-loathing and a pathologically negative mindset. Consequently, he is usually very hesitant and timid. A beautiful boy with short black hair, purple streaks, and jade eyes. He possesses the ability to blend into the darkness. He is already under contract with the protagonist.

An artificial spirit whose seal was broken by Guest after Nachtstrahl's party found her sealing stone. Created by the Great Alchemist for his daughter, Juline, that girl was her Master before contracting with Guest. she cherishes both Juline and the protagonist equally. A bold and resilient woman born as a knight-type; once she swings her blade, there is nothing she cannot cut. A beautiful woman with long black hair, golden eyes, and a blue dress. She has the power to manipulate ice and cold. She dotes on the protagonist and does not get along well with Nachtstrahl.