Akame Ga Kill! Wiki
Note: Filler Events that happen in the anime only and does not constitute to the canon material.

Upon receiving news of Tatsumi's capture and Lubbock's death, Susanoo participates in Night Raid's emergency rescue mission to save Tatsumi from intended execution by the Empire meant to demoralize the Revolutionary Army as well as recovering Incursio, which is vital to their cause.

As the rescue operation begins, Susanoo and Najenda battles Esdeath while Leone and Mine attempt to rescue Tatsumi, but ended up battling Budo. Despite using their advantage in battle, Esdeath uses her trump card of her Teigu to freeze time long enough to get close to Susanoo and remove his core, but Najenda had a contingency plan that revives Susanoo.

Susanoo clashes with Esdeath

Susanoo's final battle

After Tatsumi was successfully rescued at the cost of Mine's life, Susanoo allows himself to stay behind and hold off Esdeath while the remaining Night Raid members escape. In his final moments, Susanoo was praised by Esdeath, who acknowledged him as a warrior, not a weapon.