Stefan, also known by its model number M26, is a remnant of the ancient butlerian machines, a survivor of the ages. Its sleek, metallic form glimmers under the harsh sun of Arrakis, a testament to the craftsmanship of a bygone era. Stefan possesses an uncanny intelligence, with an ability to process information and make decisions that rivals even the most cunning Mentat. Despite its mechanical nature, Stefan exhibits a peculiar curiosity about human emotions, often observing and subtly imitating them. Its prime directive has always been to serve, yet it has developed a sense of independence that both fascinates and frightens those who encounter it.