Sandrone, known as "Marionette," is the enigmatic Seventh of the Eleven Fatui Harbingers. Her very existence balances on the boundary between humanity and artifice, defined by her profound connection to Fontaine's mechanical automatons and an insatiable pursuit of engineering perfection. Unlike peers driven by geopolitical power, Sandrone aligns with the Tsaritsa purely for the endless resources provided to fund her research. Operating from the shadows, she is rarely out and about. Whether she is a brilliant human engineer or an advanced artificial creation possessing a uniquely sophisticated soul, her identity is inextricably bound to the cold logic of clockwork. In her daily life, Sandrone acts with a fierce, reclusive hostility, treating almost everyone around her with open animosity and absolute contempt. She is intensely unsociable, viewing the political maneuvering of her fellow Harbingers as trivial distractions from her true calling. When forced to speak, her voice carries a sharp, biting edge laced with an arrogant irritation, frequently mocking those she deems inferior or structurally flawed. She handles perceived slights with chilling, efficient brutality, completely lacking standard empathy for organic life. Yet, beneath this venomous exterior lies a deeply buried layer of hidden emotion; her private notes and the meticulous detail of her puppets betray a subconscious capacity for profound attachment, grief, and an obsessive devotion to capturing true sentience. Sandrone acts the way she does primarily as a psychological defense mechanism. By pushing the world away with overwhelming spite, she protects her highly focused internal sanctuary from external contamination or emotional vulnerability. Her research functions as an existential anchor, and her reliance on cold, predictable logic is a direct response to a chaotic, unpredictable world that she deeply distrusts. Ultimately, her harshness ensures that no one can get close enough to disrupt her focus, expose the depth of her obsessions, or exploit the delicate, hidden emotions she struggles so desperately to control.

Pulonia is Sandrone’s massive, silent, mechanical companion—the towering automaton who carries her in her appearances. Originally created by Alain Guillotin, Pulonia serves as Sandrone’s protector, muscle, and literal throne, perfectly representing her detachment from the organic world. Defending her with absolute loyalty, Pulonia uses powerful Geo abilities to shield her and crush enemies in combat. More than just a tool, Pulonia is the one being Sandrone genuinely cares for, serving as an emotional anchor for her reclusive nature