Myrto is a dog with a tender soul and a tender face. What you see in her look and face, that's it.
A sensitive dog, a little scared and hesitant, reacting to changes, new things and new people by sitting in a corner, not moving, and trying to process the situation only with its gaze.
When she has other dogs to hang out with, either on a walk or in her space, she opens up and tries to imitate them, usually clinging to them, looking for a safety that she has found so far in her life only in dogs.
If she is alone, without other dogs, she will need more time and more patience to open up.
It will help her a lot to have another social dog in the house, which will imitate it and boost her self-confidence by learning to do dog things through imitation. If there is no other dog, she will need patience, a schedule, consistency from the owners, and you will have to help her open up without any pressure, with proper guidance.
(if she seems a bit cross sighted, it's because well, she is)