What is the good quality about meg?

Meg really beats herself up about her sort-comings. She constantly asks for help and is afraid to take chances. It isn't until Mrs. Whatsit convinces Meg to turn her headstrong stubbornness into strength that Meg begins to shine. Whe she faces off against the giant brain, Meg is able to go the distance because she can channel her stubbornness into perseverance, and turn her low self-esteem into self-certainty.