Zephyr (西風の旅団) is one of the preeminent jaeger corps in Zemuria and their rivalry with Red Constellation is almost as well known as their prowess on the battlefield. Zephyr was led by Rutger Claussell (known as the Jaeger King) until he and Baldur Orlando resolved to settle the question of whose was the strongest jaeger corp with a personal duel. When the duel concluded with the mutual death of both participants, Zephyr seemingly disbanded. It was later revealed that the group continued to operate in secret and are pursuing a currently unknown mission. Two of Zephyr's regimental commanders were hired by Duke Cayenne and served him during Erebonia's civil war in late 1204.