Of these, a heroine needs patience above all else. Impatience leads to conflict and stress.

Then honesty (in a good way- not being tactless and pretending you're "just being honest").

They must be patient. How are they going to get anywhere if they're not patient with the people they meet?

Patience is really important in times of trouble and stress. A heroine also needs to be patient with people, even if someone is the most annoying person on earth.

Or patience, but honesty is so important for me! Dishonesty leads to chaos and distrust.