Betelgeuse Romanee-Conti, once called Geuse, is a four-century-old spirit who co-founded the Witch Cult and held the title of Sin Archbishop of Sloth. Initially rational and compassionate, he forged deep bonds with Emilia and her aunt Fortuna in Elior Forest. His life fractured when he absorbed the incompatible Witch Factor of Sloth to shield them from an assault by Regulus Corneas and Pandora. The act unleashed relentless agony and mental collapse, culminating in Fortuna’s accidental death under Pandora’s influence—a trauma that obliterated his sanity and erased his former self. Consumed by madness, he fixated on repaying devotion to Satella, the Witch of Envy, through frenzied acts of diligence. He embraced self-harm, erratic gestures, and brutal punishments against perceived laziness, spearheading Witch Cult assaults on Emilia’s village and Roswaal Manor. His Authority of Sloth conjured Unseen Hands—invisible telekinetic limbs that crushed foes, merged for devastating force, and propelled him through air. He augmented his reach with earth magic and parasitic possession of human hosts. Centuries of chaos ended when Subaru Natsuki engineered his physical demise, dispersing his Witch Factor. In alternate realms, he exists adrift from the Cult, his insanity mellowed into quirks. He debates love with figures like Albedo but faces expulsion from a school for boundary violations, his menace dulled yet his eerie presence lingering. His descent from guardian to fanatic traces a path of loyalty warped into obsession, his past erased by tragedy. Ties to Fortuna and Emilia echo his forsaken humanity, while his powers and rampages across timelines cement a legacy of ruin and deluded reverence.