Fuguo Suzuki holds the position of eldest son in the central family of the series, frequently acting as a voice of reason amid the household's chaotic dynamics. His grounded demeanor provides a stabilizing counterpoint to the absurdity displayed by other family members. Driven by a serious commitment to academics, he dedicates himself to his ambition of becoming a doctor, embodying responsibility and often prioritizing his studies. Yet he occasionally joins the family's unpredictable escapades, revealing a hidden capacity for mischief beneath his composed exterior.

Fuguo displays a protective instinct toward his younger sister, Kotetsu, attentively shielding her from trouble. This guardianship sometimes demands physical intervention, a task aided by his martial arts background. When confronting challenges, his intense concentration often leads to unconventional or comedic solutions. While the family’s actions regularly disrupt their Urayasu City neighbors, Fuguo typically serves as a moderating influence during these disturbances. He navigates a delicate balance between unwavering familial loyalty and his personal aspirations.