Complex sentence: Sasarai (not a Star of Destiny) is a Harmonian bishop sent as a general when the Highland requested military aid from Harmonia and is the bearer of the True Earth Rune.
Split into simpler sentences: Sasarai (not a Star of Destiny) is a Harmonian bishop sent as a general when the Highland requests military aid from Harmonia. He is the bearer of the True Earth Rune.