Irons was given two different dressing rooms with two sets of costumes for playing his two characters. However, given the fact that he said "the whole point of the story is you should sometimes be confused as to which is which", he chose to use only one of the rooms and combine different costume items intended for different characters. Irons also developed an "internal way" to portray each character, employing the Alexander technique for "different energy points", giving each character his own appearance.