The following article contains an answer for the question: What is the name of the person whose features are not sharply defined? , can you please find it? 

The painted surface is divided into quarters horizontally and sevenths vertically; this grid is used to organise the elaborate grouping of characters, and was a common device at the time. Velázquez presents nine figures—eleven if the king and queen's reflected images are included—yet they occupy only the lower half of the canvas.According to López-Rey, the painting has three focal points: the Infanta Margaret Theresa, the self-portrait and the half-length reflected images of King Philip IV and Queen Mariana. In 1960, the art historian Kenneth Clark made the point that the success of the composition is a result first and foremost of the accurate handling of light and shade:
Each focal point involves us in a new set of relations; and to paint a complex group like the Meninas, the painter must carry in his head a single consistent scale of relations which he can apply throughout. He may use all kinds of devices to help him do this—perspective is one of them—but ultimately the truth about a complete visual impression depends on one thing, truth of tone. Drawing may be summary, colours drab, but if the relations of tone are true, the picture will hold.
Velázquez further emphasises the Infanta by his positioning and lighting of her maids of honour, whom he sets opposing one another: to left and right, before and behind the Infanta. The maid to the left faces the light, her brightly lit profile and sleeve creating a diagonal. Her opposite number creates a broader but less defined reflection of her attention, making a diagonal space between them, in which their charge stands protected.A further internal diagonal passes through the space occupied by the Infanta. There is a similar connection between the female dwarf and the figure of Velázquez himself, both of whom look towards the viewer from similar angles, creating a visual tension. The face of Velázquez is dimly lit by light that is reflected, rather than direct. For this reason his features, though not as sharply defined, are more visible than those of the dwarf...

Velázquez