Margret's last name does not appear (outside of the credits) in the American release of the game. Her listing is just simply titled "Margret" and when she dies the screen just simply states "Margret is Dead". This is quite strange as every other release of the game states her full name, Margret Moonlight, much like Alice Moonlight.
This was proven to be a dubbing error as Alice's real last name was Twilight and is corrected in all other releases.