She is the person who gives Luke Triton a Toy Car. Later on in the game she meets Dean Delmona in the Hotel. The Dean, actually Don Paolo in disguise, asks about Layton. Also she is related to Segal who spends his time away from his family because they are having a feud of sorts. In the Credits Margaraet is one of the various people seen leaving Future London, of course everyone did escape. Also during the credits Segal came back to The Hotel Duke and Margaret was looking quite cross.
Margaret is the manager of the Hotel Duke on Southern Street. Though she often dozes at the front desk when the hotel is quiet, her commitment to customer service is unwavering. She is married to Segal, but he is rarely around.