— Rutger Claussell, summoning Zector
An unnamed Jaeger was Zector's Awakener in the past.
Zector's final Awakener was also a jaeger: Rutger Claussell. In S.1203, Black Alberich orchestrated a legendary battle between the two strongest jaegers in Western Zemuria: Rutger and Baldur Orlando. Both of them were selected as potential Awakeners of Zector. The two died at the end of their 3-day, 3-night long battle, but because of Alberich's preparations, one of them would be able to be revived as Zector's Immortal Awakener.
In one of the Spirit Shrines, Rutger and Zector held the Second Rivalry against Rean Schwarzer piloting Valimar (assisted by Crow Armbrust piloting Ordine). Rutger lost the Rivalry and Zector was absorbed into Valimar, causing Rutger's death.