Very interesting topic discussed here, Radha prompting Krishna to save Yajnaseni in the royal court! What?
Draupadi was the mysterious, fiery yet compassionate queen of the five Pandava brothers, and is also considered as the sole reason behind the great Mahabharat war!! But as a woman with sacred and Divine powers, Draupadi symbolizes the binding of the five chakras in the human body!! She is thus referred to as Kula Kundalini, which is an unconquerable power by any mere human.
Rare in the culture of ancient times, Draupadi was a fearless woman. She demanded justice directly from Dhritarashtra, the king of Hastinapur when she was insulted. She, as Sairandhri, again demanded justice directly from king Virata when she was insulted by his brother-in-law Kichaka. She openly condemned those kings (Virata and Dhritarashtra) for failing to protect a woman. She even condemned great warriors such as Bhishma, Drona, Kripacharya, and her husbands for not saving her from the humiliation during the Cheer-Haran episode.
It is said that when Duryodhana and Dushasana subjected the Pandava princes' wife Draupadi to an attempt at disrobing her, she prayed to her Sakha, her brother Krishna. Then Krishna sent immeasurable reams of cloth to keep Draupadi covered, thus defeating the evil and nefarious designs of the Kaurava princes.
There are many reasons for Krishna's divine intervention.
And there are other stories too to prove the good nature of Samrajni Draupadi!
According to Vyasa's description in Mahabharata, it's Draupadi's Dharma that saved her from the shame of being disrobed?!!
In Shiva Purana, it's stated that sage Durvasa gave a boon to Draupadi that saved her from being disrobed?!! Durvasa never had a history of saving someone, but it was mentioned in Shiv Purana that he pleased for the help of Panchali and blessed her with a boon!
Two different stories are in vogue. One - once while Sage Durvasa was taking bath in the river Ganga, his garment was washed away and, Draupadi who was there, then tore a portion of her clothing and gave that to him. Durvasa then blessed her that in critical times this generous act would come to her rescue.
Another - During Sri Krishna's visit to Indraprastha, He injured his fingers. She tore a piece from her upper cloth and tied that to Sri Krishna's finger to arrest the flow of blood. In return for that virtuous act, she was saved from humiliation.