Yudhishthira, the eldest Pandava, is called Dharmaputra (son of Dharma/righteousness) because he was born from the invocation of Yama, the god of death and justice. He is known for his unwavering adherence to truth and dharma. Arjuna was a great warrior, Krishna was the divine charioteer, and Bhishma was the grandsire of the Kuru clan.