Who is the real hero in the short story the lagoon by Joseph conrad?

By sacrificing his(Arsat's brother)own life Arsat's brother proved that there is no better friend than a brother. By corrupting an ideal under the strain of an actual experience and by showing himself inferior before a tension between love and brotherly loyalty.Arsat's brother assisted Arsat in eloping with his beloved risking his own life heroically.He tried to prevent the followers of the rulers from chasing Arsat and Diamelen. He fired them thrice then he was surrounded by the enemies who ultimately overpowered him and killed him. So in this way Arsat's brother performed a heroic role by saving the lives of Arsat and Diamelen who tried to live in the world of illusions of peace and light. sai baba