Luisa is from Madeira, not Bulgaria.
There is a clue in that her husband started work at 8pm & his first duty was to clean up around the pool area. Had they had a meal in Luz after both finished their respective jobs at 1800hrs & she had left him at the Tapas Bar then gone up to the street corner to wait for a lift/meet someone?
That makes sense. A bit of time together early evening. Outside block 5 was a good place to be picked up by a taxi from the rank by the church, too. Up R 1 da Maio, turn left, pick her up and out to Lagos. I still think Jane Tanner was the 8.30 sighting by Jes Wilkins.
As her husband was working that night and she was at work the following morning I can't see them as suspects. If SY are looking for her it's more likely to be as a witness to anything she may have seen or heard nearby.
On the other hand is any of this factual? It seems to me to be speculation presented as fact but if there is any truth in it should the Express be printing the couple's names?
"THE “woman in purple” being sought by Scotland Yard detectives in Bulgaria in connection with the Madeleine McCann case worked with her husband at the Ocean Club resort on the Algarve in Portugal."
https://www.express.co.uk/news/uk/881339/madeleine-mccann-police-hunt-waitress-woman-in-purple-scotland-yard-bulgaria
