Kotoe Hōjō is a supporting character in Magnerobo Ga-Keen. She is the older sister of the protagonist, Takeru Hōjō. After the death of their mother during a childhood incident, Kotoe assumed the role of a maternal figure within the family, taking on the responsibility of caring for her younger brother. Her personality is defined by warmth, gentleness, and a deep sense of duty. She strives to provide emotional stability and a nurturing home environment, shielding Takeru from their father’s severity and acting as a protective buffer between them.

Her primary motivation is to safeguard Takeru and support him through the escalating conflict with the Izar aliens. Though she is not a pilot and possesses no special combat abilities, her strength is found in her quiet resilience and unwavering compassion. Her presence offers Takeru the emotional grounding he needs, contributing to his gradual maturation from a selfish and impulsive fighter into a more cooperative and dependable member of the Ga-Keen team. Kotoe’s relationship with Takeru lies at the heart of her character, embodying a steadfast familial devotion that remains constant as the series progresses.