Sinclair (シンクレア) is an attractive young woman that appears to be of Indian descent, her design and sword have lead to presumptions she is an assassin of some sorts. She is working with Wyler pretending that she encourages him in his experiments but secretly wants him to stop them and not achieve his dream, whether she is there to assassinate him or not is unknown.
Like Wyler, Sinclair does not have an ending sequence, instead completing the game with her just gives the player the game's credits.
Opposite to Wyler she can be thrown, but cannot use throw moves herself.