Enko Saenai is a central figure in the household of the series, serving as the domineering and sharp-tongued wife of the protagonist, Hideo Saenai. She is a woman in her fifties who, despite being a homemaker, has little interest in performing domestic chores herself, preferring to delegate these tasks to her husband as soon as he returns from work. Her personality is most notably characterized by her bossy and critical nature, which has led to her being described as a wife from hell by those observing the family dynamics. She frequently berates her husband for his lack of career ambition and what she perceives as insufficient earnings, accusing him of neglecting his family duties.

Her motivations appear to center on maintaining control over her household and prioritizing her children's well-being above all else, with her family life revolving around her commands and expectations. Enko is also portrayed as being highly protective of her children, a teenage daughter named Haneko and a younger son named Moyao, and she considers her social circle of fellow mothers to be the most important community in her world. Despite her harsh exterior and relentless criticism of her husband, there is an underlying, deeply buried affection for him, although she never openly shows it.

In the story, Enko's primary role is to be the source of domestic pressure and conflict that complicates the protagonist's life. She issues unreasonable demands, such as ordering him to deliver a forgotten lunchbox to their daughter’s school even when it conflicts with his important work meetings. Her behavior traps Saenai between the pressures of his mundane job and the chaos of his home life, making his reluctant secret superhero duties even more difficult to manage. Her key relationships are defined by her dominance over her husband, who is too meek to defy her, and her overprotectiveness towards her children, who also show little respect for their father.

Regarding development, Enko's character remains consistently domineering throughout most of the narrative. However, it is suggested that she feels a genuine, if unexpressed, bond with her husband. The stress of his double life and her constant nagging are central to the series' comedic and dramatic tension, as her husband struggles to live up to her expectations while secretly saving the world. Her notable abilities are not supernatural but rather social and psychological, as she possesses a formidable will and a sharp tongue that effectively controls the entire Saenai household, leaving her husband, children, and even her husband's coworkers aware of her powerful presence.