Tsuranuki no Kishi, known as the Penetrator in English, is a formidable boss in the action RPG Demon's Souls. Serving as the guardian of the Boletarian Palace's third area, he is a towering knight clad in shining armor and wields a massive sword capable of piercing through multiple foes. As a loyal protector of Boletaria and its king, his tragic fate under demonic influence makes him a memorable adversary, challenging players with swift, deadly attacks and testing their combat skills.