If it truly is from Molly's POV, and Molly wouldn't have noticed Emma, then perhaps it doesn't matter whether Emma is brought to the attention of the reader within the context of the Molly-POV scene. Is there a way, in the immediately previous scene (Emma's POV, presumably) that Emma could establish that she'll be there? [e.g. "I'm going over to the First National Bank now, George. See you in a few," Emma called over her shoulder as she walked out the door.] If it's necessary that the reader recognize Emma, even though Molly doesn't, then I agree with the comments above, give Emma something recognizable and distinctive [e.g. "Going to the bank now, George," Emma said, checking the tilt of her orange and yellow polka-dot beret in the mirror before sailing out the front door. (And then Molly notices the woman in the polka-dot beret as she's standing in line at the bank.)]