"Ema Nymton" is the moniker used by Mick Flemm's associate. The name actually means "not my name" backwards. Her real name is unknown.
"Ema" would visit pawn shops and pawn a bracelet which she presented as a family heirloom, is loaned some money and then Flemm breaks into the shop and steals it.
She visited Rook's Pawnshop and told Rook that she would reclaim it in a month. Rook loaned her $8000, 1/10 of its worth. Rook was another victim of Flemm.