Board Thread:General Discussion/@comment-26912075-20170305214816/@comment-28530148-20170705045946

That's just a fan theory, nothing more. The first time Polnareff's Requiem activated it was during a totally calm, non-combative moment in time, as he reached behind his cabinet to retrieve the arrow. It had the same sleeping and soul switching abilities then as it does during the final battle.

The "what the user desires" part of it is interpreted as Requiem defending the arrow and trying to get away from the scene. It doesn't have any influence on its actual abilities.