Tristan is a Knight of the Round Table from the Fate series, known as the 'Child of Sorrow' due to his unblessed birth. He is depicted as a red-haired archer who always keeps his eyes closed, opening them only in battle. A tragic figure from Arthurian legend, he remonstrated against King Arthur's cold demeanor out of loyalty, later regretting his words upon understanding her true intentions as a heroic spirit. In Fate/Grand Order's Camelot chapter, he becomes a powerful antagonist under the Lion King's influence, receiving a 'gift of reversal' that amplifies his cruelty. Despite his sad fate, he finds something pleasant before his ironic death by a rampaging Shaitan. His combat style features artistic violence with a demon string instrument that uses sound waves for deadly attacks, blending beauty and brutality.