Fate/stay night (2006)

S1E9 Elegance in the Moonlight

Saber is excited about visiting the temple, but Shirō firmly believes it’s too risky and insists they stay away. However, once Shirō drifts off to sleep, Saber decides to venture to the temple alone. There, she encounters Assassin, who surprisingly unveils his true identity as Sasaki Kojirō. Their conversation is short-lived as battle ensues. Meanwhile, Rider quietly slips past them to confront a mysterious woman inside the temple. Who is she, and was Shinji behind this scheme all along?