10 | : A Sound Argument

Set two years before the present-day conflict, the episode explores the introduction of foreign diplomacy to Paradis Island and the tragic weight placed on Queen Historia. The Visit from Hizuru

The "sound argument" of the title refers to the cold logic that sacrificing one individual (Historia) is a necessary evil to save the nation. 10 : A Sound Argument

: In the present day, we see the tragic outcome. Historia is shown pregnant and despondent, seemingly having accepted a fate she never wanted. Set two years before the present-day conflict, the

The episode concludes with the realization that while the plan was logically "sound," it destroyed the very humanity the Survey Corps fought to protect. Attack on Titan - Season 4 Episode 10 - "A Sound Argument" Historia is shown pregnant and despondent, seemingly having

The story begins with the arrival of Lady Kiyomi Azumabito, the first foreign guest to visit the walls of Paradis. She reveals a hidden lineage: is the lost descendant of the Shogun of Hizuru. While the news brings a glimmer of a possible ally, it comes with a steep price tag: Zeke Yeager’s "Three-Point Plan" for Eldia’s survival. Zeke's Plan and the Sacrifice Zeke’s strategy involves:

: A small-scale display of the Wall Titans' power to deter world invasion.

: In a poignant flashback, Eren Jaeger vehemently refuses to let Historia be used as a "breeding tool".