Lala Hiyama oversees provisioning for new Garde pilots within the Sidonia's dormitory. She inhabits an anthropomorphic bear-shaped life-support suit, essential for sustaining her biological functions and entirely concealing her original human form. This suit incorporates a powerful mechanical prosthetic arm that grants her significant physical augmentation. Despite her imposing appearance, she manages the pilots' daily needs with a generally nurturing and warm demeanor. Her background includes active combat service as a Guardian pilot during the Fourth Gauna War, where she survived as one of the conflict's few veterans. This experience contributes to her exceptional strength, demonstrated through actions like effortlessly lifting and throwing humans with her prosthetic arm. Following her pilot career, she joined the Immortal Ship Committee but later departed due to irreconcilable differences with other members. Lala Hiyama enforces a strict boundary regarding personal address, reacting with intense anger if addressed by her first name "Lala" instead of her full name or formal title. This underscores her preference for professional distance within her otherwise maternal role. Her character functions remain consistent across all series seasons, film adaptations, and related media, without substantial development or expanded narrative scope beyond these established parameters.