The Alchemist, also referred to in French as l'Alchimiste, is a character introduced in the fourth season of the animated series Castlevania. This entity initially appears as a mysterious and powerful mage who resides within the Infinite Corridor, a dimension that exists between worlds and which it controls absolutely. The Alchemist demonstrates an extensive and esoteric knowledge of alchemical principles, using this expertise to manipulate events and individuals from the shadows. Its outward demeanor is that of a patient, cunning, and informed being, often speaking in riddles or offering cryptic guidance. However, beneath this facade lies its true nature: the Alchemist is in fact a disguise assumed by Death itself, an ancient, primordial force that exists solely to consume the souls of the dying. Its interest in alchemy is purely utilitarian, serving only to create items or beings that will allow it to gather more souls. The Alchemist plays a pivotal role in the story by manipulating the scholar Saint Germain into attempting to create a Rebis, an unholy fusion of two souls, with the ultimate aim of unleashing destruction on a vast scale. This scheme brings the Alchemist into direct conflict with the series’ protagonists, Trevor Belmont, Sypha Belnades, and Alucard, who must venture into the Infinite Corridor to stop it. The character’s development is revealed as the mask of the alchemist is stripped away, exposing the cold, amoral hunger of Death itself. In terms of notable abilities, the Alchemist wields complete mastery over the Infinite Corridor, allowing it to control space and movement within that realm. It also possesses deep alchemical knowledge, enabling it to craft powerful artifacts and influence magical processes. As Death, it has the ability to consume souls, manipulate life force, and manifest in a skeletal, terrifying form. Despite its power, the Alchemist is ultimately defeated when its plans are thwarted by the combined efforts of the heroes.