What is Ophelia's Tragic Flaw?

Ophelia's tragic flaw is the loyalty she affords those she loves. This loyalty renders her incapable of emotionally handling his mistreatment, in addition to the demands of her father and brother.

Ay, springes to catch woodcocks. I do know,
When the blood burns, how prodigal the soul
Lends the tongue vows. These blazes, daughter,
Giving more light than heat, extinct in both
Even in their promise, as it is a-making,
You must not take for fire. From this time
Be somewhat scanter of your maiden presence.

Act I

She speaks much of her father; says she hears
There’s tricks i’ the world; and hems, and beats her heart;
Spurns enviously at straws; speaks things in doubt,
That carry but half sense.

Act IV