Durga
Protector against chaos
The Slayer of Mahishasura
Durga is one of the principal goddesses of Hinduism and is widely revered as a warrior mother, protector, and embodiment of divine power. In the best-known narrative from the Devi Mahatmya, she arises to defeat Mahishasura, the buffalo demon, when the gods themselves are overpowered.
Mahishasura wins a boon that makes him nearly invincible, and his violence spreads across the worlds. In response, the gods release their combined energy, and from that blazing radiance Durga appears. She is therefore understood not as a separate helper entering the scene, but as the concentrated shakti of the divine powers acting together.
The gods arm her for battle: Shiva gives the trident, Vishnu the discus, Indra the thunderbolt, Varuna the conch, Agni the spear, Vayu the bow, and Himalaya offers the lion that becomes her mount. Her many arms symbolize that divine strength works in many ways at once: courage, protection, discipline, justice, compassion, and unstoppable resolve.
The battle is long because Mahishasura constantly changes shape, moving between buffalo, lion, elephant, and warrior forms. Durga counters each transformation without losing balance. In the final scene she subdues him, pierces him with her weapon, and restores cosmic order by defeating the force of arrogance, violence, and confusion that he represents.
Wikipedia also notes that Durga is associated with protection, strength, motherhood, destruction, and wars. That blend is important to her worship: she is fierce against adharma but deeply compassionate toward devotees. Festivals such as Navaratri and Durga Puja celebrate her as the power that protects the good, destroys evil, and returns harmony to the world.
She is formed from the combined divine energies of the gods and defeats Mahishasura in the Devi Mahatmya.
Lion, trident, discus, sword, conch, lotus, bow, and ten arms showing command over many energies.
Divine protection, righteous power, maternal strength, and the courage to confront disorder directly.
Navaratri and Durga Puja celebrate her nine nights of protection, power, and victory.