The store at the South Shore Plaza in Braintree may be called “Forever 21″, but the robber who held up the business on Friday night had on a mask that looked anything like “21″. Braintree police report the robber had on an “old man mask”, white gloves, and was wearing a black hooded sweatshirt. He was also brandishing a handgun. Police say the robber grabbed a female employee by the arm and pointed what appeared to be a 9mm handgun at another female employee and told her to “get the money.” The thief then grabbed the night deposit bag and fled the store. An extensive search of the area was made by police, but they did not find the robber.