Eren meets the handpicked members of the squad— Petra Rall, Oluo Bozad , Eld Gin , and Gunther Schults —all elite soldiers with high titan-kill counts tasked with protecting (or killing) him if he loses control.
During a quiet moment, Petra reveals to Eren that Levi wasn't always a model soldier; he was once a notorious criminal in the Capital's underground until Commander Erwin Smith recruited him. Hange’s Titan Experiments Shingeki no Kyojin Episode 15
Eren is moved to an abandoned, remote castle that serves as the headquarters for the Special Operations Squad (Levi Squad). Eren meets the handpicked members of the squad—
Hange has been conducting bizarre, often painful experiments on two captured Titans named Sawney and Bean. Hange has been conducting bizarre, often painful experiments
Hange reveals that Titans do not seem to need food or water but are strangely dependent on sunlight for energy. Eren is fascinated by Hange's empathetic approach to these "monsters," as she sees them as subjects of mystery rather than just enemies. The Mysterious Sabotage
In of Attack on Titan , titled " Special Operations Squad: Eve of the Counterattack, Part 2 ," the story shifts from the courtroom drama to Eren’s integration into the Survey Corps. The Special Operations Squad
Despite their lethal skills, Eren is surprised to find them focused on mundane tasks like cleaning the dusty castle under Captain Levi's strict, obsessive supervision.