Sasha Blouse hailed from Dauper, a village in Wall Rose's southern territory, raised within a community of hunters. She learned hunting skills from her father but grew intolerant towards refugees from Wall Maria who encroached on the village hunting grounds, causing food shortages. This sparked conflict with her father, who urged adapting traditions to help others, leading Sasha to enlist in the military in defiance. Training in the 104th Cadet Corps revealed unconventional instincts and athleticism, yet she struggled with group coordination. On her first day, she stole a steamed potato from the kitchen and ate it during initiation, earning the moniker "Potato Girl." Confronted by instructor Keith Shadis, she offered him a portion, resulting in punishment by running until exhaustion, highlighting both her compulsive relationship with food and resilience. She initially masked her rural accent with overly polite speech, drawing criticism from Ymir but defense from Christa Lenz. Her hunting background fostered sharp intuition, though it hindered performance in standardized drills. She graduated ranked 9th in her class. Assigned to maintain wall cannons during the Trost District battle, Sasha stole meat from officers' provisions, sharing it with comrades while envisioning plentiful livestock after reclaiming Wall Maria to boost morale. When the Colossal Titan breached the gate, she used her omni-directional mobility gear to save fellow cadet Samuel Linke-Jackson from falling off the wall. Stranded without gear fuel during the Titan invasion, she unsuccessfully urged peers to retake the headquarters before joining Mikasa Ackermann's charge, mocking others' inaction to provoke participation. During the operation to secure the supply room, an insufficient neck cut caused her to fail killing her assigned Titan, requiring Mikasa's intervention. After the battle, Sasha faced a crisis of confidence, attempting to feign illness to avoid further combat. Despite this fear, she chose to join the Scout Regiment alongside peers like Connie Springer and Jean Kirschtein, motivated by Eren Jaeger's determination and her own promise of future abundance.