Damrada/Chronology

Saint-Monster Confrontation Arc
He worked with Yuuki and the Rosso family, and supported King Edward's faction during Falmuth's civil war. He provided them with demon slayers from the Eastern Empire, but decided to retreat once he heard about Diablo.

Dragon-Monster Clash Arc
Damrada participated in Yuuki's initial preparations for rebelling against Emperor Rudra; he killed Gadra as a measure to keep him from falling to Kondou's hands and extracting his information, knowing full well he had a resurrection bracelet on him. Damrada's true position in the empire and his connection with Rudra was disclosed, being the vice commander of the Imperial Guardians. It was also revealed that he assigned both Jiu and Bernie to guard Masayuki. In the end, Damrada's plans were made known to Kondou and he was placed under his control. Yuuki freed him shortly after, but was subsequently defeated by Rudra and made his pawn. Damrada gave up resistance and followed Rudra again.

The Abyss Unleashed Arc
In the battle against Rimuru's forces, Damrada faced off against Ultima and was defeated in a fierce showdown. In his final moments, he regrets how he wasn't able to fulfill his promise to Rudra, but at the same time felt relief that he could entrust it to Rimuru. Damrada began to ponder why Rudra took control of Yuuki when it was him that ordered Damrada to kill him. He deduced that his friend's mind had long been taken over by the ultimate skill Michael and was sad at this realization. Damrada formed a contract with Ultima to kill Rudra and protect Masayuki, offering his all as compensation, and passed away.