As per Narada and Vayu Puranas, Draupadi was composite Avatar of Goddesses Shyamala (wife of Dharma), Bharati (Wife of Vayu), Sachi (wife of Indra), Usha (wife of Ashwinis) and hence married their earthly counterparts in the form of the five Pandavas. Enraged at a jest by Parvati and the four goddesses, Brahma cursed them to human birth. Parvati thought of the solution wherein they will be born as one woman, Draupadi and hence share the earthly body for a smaller period of time. Draupadi's characteristic fight against injustice reflects Parvati or her Shakti, Kali inhabiting Draupadi's mortal flesh at times. At other times, Draupadi was docile and even waited to be rescued (as in case of Jayadratha and Jatasura) showing the qualities of other goddesses like Sachi and Usha. Other times, she showed astuteness in hiding their true identity and asking Vayu putra Bhima to kill the evil Keechaka like Goddess Bharati would. another explanation, At Pandavas residence Lord Krishna took Draupadi aside and said, "This awkward situation you find yourself in is of your own making. In your previous birth you had pleased Lord Shiva with your prayers. He granted a boon to you. You said that you wanted a husband and to ensure that your request was heard, you repeated it five times in all. Shiva then said that in your next life you would have five husbands." Some sources have a slightly different narration. Draupadi made her request only once but she added a long list of qualities that she wanted in her husband. Shiva said that it would be impossible to find one man with all these qualities. Hence she would have five husbands in her next life. All of them together would posses the qualities she had enumerated. Lord Krishna said ," You will spend one year with each husband. Others will be forbidden to enter the chamber in which you and the husband-of-the-year are staying. If one does so, even accidentally, he would be exiled for one year."