Porpentina (or Tina) Goldstein was an American witch who was an Auror for the Magical Congress of the United States of America (MACUSA). After getting in trouble for assaulting a No-Maj (US term for Muggle), Tina was almost fired. That is until she met her future love-interest, Newt Scamander, and became embroiled in the hunt for Gellert Grindelwald.