The Dark Hour, as with any other strange realm in the World of Darkness, runs on its own rules. I don't think we need to tell you how dangerous it is either.
One of the only consistent things about the universe is that it changes, right down to the creatures who occupy it. Cards are no exception. While some life-changing events only make a person more of who they already are, others place them on a completely different path from where they started. As such, a Card’s Triumph can change, together with their Persona.