Answer: Low self esteem.
Explanation:
Low self esteem is a low believe in oneself. An individual thinking lowly of himself, not being confident in one's ability, feeling bad about one's self.
Martina has a low believe in herself, although she has the quality to carry out a role she doesn't believe she can do it.
She is not also able to forge her path but rather wants to always be in the shadows of others.