A great monkey-king; brother and enemy of Sugriva. (Glossary for the Vahinis)

Through the grace that Indra bestowed on her (Ruksharaja), she got a son, Vali. (RKRV Part II, p.86)

Vali was a very strong and powerful Vanara king; but he lacked virtue and indulged in evil deeds. (SSB 2002, p.102)

A fierce fight ensued between the two brothers. Rama, hiding behind a tree shot an arrow at Vali and brought him down.

Though Vali fell down, there was still life left in him. Shri Rama went to Vali and said to him, ‘You have sinned against your brother Sugriva, you have appropriated his wife. That is a sin because a younger brother’s wife is like one’s daughter. You appropriated his kingdom, banished him and appropriated his wife. You blamed him for crimes that he had not committed. I don’t like to speak untruth. I decided to kill you and hence I promised your brother that I would help him’. Then Vali said to him, ‘O Rama! You have come into forest to keep up the word of your father. But you have interfered between my brother and me. It is unjust on your part to kill a person, hiding behind a tree.’ Shri Rama replied, ‘O Vali! I no longer live in Ayodhya. I am a hunter moving in the forest and you belong to the race of animals. A hunter kills an animal hiding behind a tree. He never goes face to face with an animal to kill it. So I had to kill you hiding behind a tree.’ Vali listened to him and further said, ‘Rama, you are a great power and strength, you could have come face to face to fight with me’. Shri Rama replied to him, ‘Vali, I know the boon that was bestowed on you. You have a boon that whoever fights you face to face, half of his strength will enter into you. I know this secret’. Vali entered into a long argument with Rama but Rama convinced him of his folly. Finally, Vali said, ‘O Rama! My life is ebbing away. Make a promise to me that you will make my son Angada, the crown-prince of Kishkindha’. Rama agreed to this and fulfilled the promise He gave to Vali. He crowned Sugriva as the king and Angada as the crown prince. (SSB 2002, p.105-106)