In a comedic hostess club scenario, Gilles de Rais critiques Jeanne Alter's performance, sparking her retaliation with fiery abilities. During a separate event, he accompanies Blackbeard to acquire ship parts, remaining notably silent throughout as Blackbeard interprets his every move. This partnership persists until the group confronts and defeats Blackbeard, returning the acquired parts. Mysterious Heroine X instinctively attacks Gilles de Rais due to his classification as a Saber-class Servant. When questioned about his association with Blackbeard, he chooses silence and departs alone.