There is no question that Miriam gets credit for Yetzias Mitzrayim, since she remained positive during the worst times, and her Koach HaBitachon did the job. She also didn’t give up when Moshe was put in the basket in the Nile River. This is even although her father Amram (who was the Gadol HaDor) potched her on her head and he said: “Miriam! What happened to your Nevua, that this baby will become: מושיען של ישראל the redeemer of Klal Yisrael?” (Gemara).
She was also the one who caused her father to remarry, and she wasn’t afraid to say: אבא, קשה גזירתך יותר משל פרעה “Father, your decree is worse than Paroh’s”, i.e., Paroh only killed the boys, but by your divorce, nobody will be born including girls. This is true Malchus. A king has no Yi'ush, and Miriam was the Bubby of Dovid HaMelech. Her descendant, Chizkiyahu HaMelech wasn’t afraid to tell Yeshaya HaNavi: בן אמוץ, כלה נבואתך וצא! Son of Amotz (a derogatory way of referring to Yeshaya), halt your Nevua, and leave! I have a Kabala (tradition) from my great grandfather, Dovid: אפילו חרב חדה מונחת על צוארו של אדם, אל ימנע עצמו מן הרחמים that even if a sharp sword is resting on a person’s neck, he shouldn’t lose hope! (Gemara).
A true Baal Bitachon is steel, and nobody impresses him or scares him. (Of course he has plenty Derech Eretz).
