Dhritarashtra, Duryodhana, Dushsana:
Dhritarashtra, the doting father of Kauravas. One among those who could have changed Mahabharata, had he chosen to. The blind king, surely deserves respect for being an able king of Hastinapur and a brave warrior inspite of his blindness.
Duryodhana, the eldest of the Kauravas and the successor to throne after his father takes repeated action to rule of Pandavas from the right to the throne in vain. Even after reaching a consensus, Duryodhana is envious of the Pandavas and with his uncle Shakuni's misleading invites Pandavas for a game of dice, paving way to the fateful Kurukshetra war. On the other hand, Duryodhana is not just depicted as a negative character. His friendship with Karna and his trust on his wife Banumathi get a mention as well!
Dushasana, the second of the Kauravas, devoted brother to Duryodhana and his ally in all plots against Pandavas. He was the one to have dragged Draupadi by her hair to the court and disrobe her. He was killed by Bhima in Kurukshetra as per his oath during Draupadi's humiliation.
Drupad, Drishtadyumna, Draupadi
Drupad, King of Paanchal and father to Draupadi. A friend of Dronacharya during his gurukul days, had assured him half his kingdom but failed in his words quoting the difference in status. Hence Drona asked for defeating Drupad as his guru dakshina. Arjuna defeated Drupad and Aswathama became the king of half the kingdom, the rest of which was returned to Drupad. Drupad repaid his vengeance by begetting Drishtadyumna through a Yagna and eventually he became the one to kill Drona in the kurukshetra war.
Draupadi, the most sung female of Mahabharata and the most ill-fated one. She was the one to break many conventional rules like being married to five husbands, having a male friend(Krishna), rejecting a suitor(Karna) in her Swayamvar and much more. She lived both a nomadic life in exile as well as the queen of the most illustrious palace of the times. She had the presence of mind to question Yudhisthra's rights to put her at stake in the gamble and the courage to challenge the righteousness of the those present in the court. Her eventful life only justified her being a witness to the the happenings at Kurukshetra war through a boon by Sage Vyasa.
Teacher of Pandavas and Kauravas. A doting father who took his son's side and thus the Kauravas' as against his favorite student Arjuna. A biased teacher who favoured Arjuna by asking for an unjust gurudakshina from Ekalavya.