Dai is a hanyou, and a protagonist from the movie Inu Yasha: Fire on the Mystic Island.
He lived with his friends and his twin brother Roku on a magical island off the coast of Japan. This island was hidden from the outside world so that the humans, benign demons and half-demons could live there in peace and harmony. However, four powerful and vicious youkai had conquered the island, and almost all of the residents were killed.
At the time of the plot, however, Inuyasha and his friends come to the island to fight against these youkai, and save the children. After the evil youkai are defeated, Dai leaves the island with his brother and friends to live in a hidden place deep in the mountains, in harmony and peace.