The idea was that the role of Belén was performed by a black girl; but none of the children could achieve it. They were too young and forgot the script, were scared by the cameras, or could not focus enough. Titina Romay was used to the filming process because she is the daughter of Pepe Romay, an actor. So the production gave her the chance and the girl made a good performance. That is the reason the little black girl is played by a white girl painted in black. Not for racism itself.