Nanase Togashi, Yuuta's mother, shoulders primary caregiving responsibilities while her husband works overseas in Jakarta. She manages the household alongside her own career, a balance that frequently keeps her away from home. Her duties include guiding Yuuta out of his "chūnibyō" phase and preserving family stability.

Nanase employs a warm, easy-going parenting approach, relishing shared activities with her children whenever possible. Despite her demanding schedule, she prioritizes their well-being and emotional security, fostering a stable home. This involves accepting Yuuta's residual delusional habits without imposing conformity, while trusting him and his sisters Kuzuha and Yumeha to cooperatively manage chores during her absences.

Practical and traditional, she values established family roles over innovation. Her characterization centers on reliability, emotional warmth, and a consistent focus on sustaining household harmony.