ARX-8 Laevatein is an advanced Arm Slave mecha introduced in the 'Full Metal Panic!' series. Developed by Mithril, Laevatein is piloted by Sousuke Sagara following the destruction of his previous unit, the ARX-7 Arbalest. Featuring cutting-edge technology, including the Lambda Driver and a wide array of powerful weaponry, Laevatein plays a crucial role in pivotal battles. Its presence marks a turning point in the fight against Amalgam, significantly enhancing Mithril’s combat capabilities and supporting Sousuke’s growth as a soldier.