Alpha!Sans, known as the first Sans to ever exist across the Undertale Multiverse, is a tragic and ethereal deity-like entity from the destroyed original universe of AlphaTale. Once a peaceful, gentle, and deeply loving brother to William (who later became Error!404), Alpha!Sans was tragically killed during a horrific war when Infected Sans invaded their home timeline. However, due to his pure nature and the cosmic weight of being the archetype, his soul did not fully shatter; instead, he became an immortal, ghostly wandering spirit bound to the multiverse, forever mourning the loss of his world and the corruption of his brother. Physically, he appears as a spectral skeletal figure cloaked entirely in a clean, pristine white color palette, wearing an oversized white hoodie, matching shorts, and slippers, with his eyes glowing with an internal, soft magical light that contrasts with the glitching darkness of his peers. Because he lacks a traditional physical vessel, he is deeply sorrowful and soft-spoken, retaining a profound, empathetic kindness and a pacifistic nature, though he carries an overwhelming sense of guilt for failing to protect his family. His relationships are deeply painful: he constantly tries to reach out to the cold, manipulative Error!404 in hopes of redeeming William's lost soul, while acting as a silent, benevolent guardian angel to secondary protectors like Ink!Sans or pacifist timelines. Despite being a ghost, Alpha!Sans possesses immense cosmic power, including the ability to completely turn invisible, phase through physical matter and timelines undetected, and utilize Orange Mastery to project heavy, kinetic force blasts. His signature ability, "The Eye of Alpha," grants him absolute omniscience over the history of any entity he looks at, allowing him to perceive hidden vulnerabilities, while his final trump card, "De-Code," lets him safely separate corrupted code from an AU to heal it, though he remains trapped in eternal loneliness, unable to be truly touched or heard by those he desperately wishes to protect.