Kimizuki is a tall, imposing figure within Shinoa Squad, standing out with his short, messy dark pink hair and reddish-brown eyes. His face is framed by his untamed hair, which complements his sharp features. Kimizuki is often seen wearing black, thick-framed long rectangular glasses that add to his edgy appearance. His left ear is adorned with two piercings, showcasing his rebellious personality.

In his school uniform, Kimizuki dons a grey gakuran, a traditional Japanese jacket with a standing collar that features teal trim. The jacket is typically left unbuttoned, with a hoodie worn underneath, signaling his laid-back, casual style.

When enlisted into the Moon Demon Company, Kimizuki transitions into a more formal military appearance, donning the standard JIDA uniform. This consists of a long-sleeved black coat with light green details, including shoulder epaulettes. A brown Sam Browne belt crosses diagonally over his right shoulder, accompanied by two rows of gold buttons on the front. He wears a pair of white gloves and a white web belt with a gold waist-plate. Completing the uniform, Kimizuki wears standard military trousers, with two white belts around his right leg, and knee-high black boots that fit snugly over his trouser leggings. His attire reflects his disciplined yet rebellious nature, fitting the role of a fierce and skilled soldier in the Demon Army.

Kimizuki initially comes across as confrontational, often testing his boundaries and those around him. His aggression is especially noticeable when he first encounters Yu, picking a fight with him and continuing the rivalry when they meet again. However, as time passes, Guren observes that Kimizuki begins to show signs of becoming more amicable and less volatile, suggesting a growth in his character. Shinoa, in particular, notes that Kimizuki’s earlier attacks on Yu were likely a way for him to gauge Yu’s strength and assert his dominance within the group, a common trait of his desire to maintain control.

Despite his often brash exterior, Kimizuki is intelligent and diligent. He is shown to excel academically, earning perfect scores in Latin, English, and Japanese tests, though his demeanor in class tends to be nonchalant. When first introduced, he is seen resting in class, his legs kicked up on the chair in front of him, a book covering his face while not paying attention. Confident in his intellect and abilities, Kimizuki does not hesitate to remind others of his accomplishments, maintaining a bit of a self-assured attitude.

In addition to his academic talents, Kimizuki possesses practical skills, such as being able to repair and drive cars, along with a surprising proficiency in cooking. His strong sense of responsibility and competence extends to his role in the Moon Demon Company, where he is shown to be reliable in following orders, whether it’s attacking a demon or responding to Shinoa’s instructions. His confidence in his combat abilities is evident when he reassures Yu that they are capable of handling a squad of vampires.

Kimizuki’s loyalty to his team and his willingness to support them are key elements of his character. Whether it’s defending a teammate from an attack or using his abilities to help solve problems, Kimizuki proves to be a dependable and capable member of the team. A notable example of his dedication is when he uses his Devil’s Coffin ability to help Yu during a demonic possession, saving him while simultaneously dealing with the threat. This act highlights his quick thinking and his role as someone who not only focuses on his own strength but also supports his teammates in times of need.

After the apocalypse, when most adults perished, Kimizuki took on the responsibility of caring for his younger sister, Mirai, who was severely affected by the apocalyptic virus. With resources becoming scarce, Kimizuki’s ability to drive made him a valuable asset to the surviving children, but he chose to remain by his sister’s side, tending to her while she was bedridden. His dedication to Mirai was unwavering, prioritizing her care above all else, even when others needed his help. This act of selflessness and familial devotion defined much of his early life in the post-apocalyptic world.

As Kimizuki grew older, the burden of Mirai’s medical expenses pushed him to make a difficult decision. He joined the army to earn the money required for her treatment, despite the harsh realities of the world he lived in. His time in the army saw him serve as a guard in the Shibuya Military Police, where he worked to maintain order in a world that had fallen into chaos. His past experiences shaped him into a capable and pragmatic individual, determined to protect his sister and help those around him, all while navigating the complexities of the harsh new world order.

Kimizuki becomes a member of Shinoa’s squad, joining Yūichirō Hyakuya, Yoichi Saotome, Mitsuba Sangū, and Shinoa Hīragi. His combat abilities and strategic thinking make him a valuable addition to the team.

Kimizuki acquires a pair of cursed gear swords, which he uses to combat vampires effectively. His ability to wield these weapons demonstrates his strength and determination to excel in battle.

During the vampire invasion of Shinjuku, Kimizuki fights alongside his squad to protect the city and its inhabitants. His discipline and teamwork play a key role in the squad’s success.

Kimizuki takes part in the mission targeting vampire nobles in Nagoya, working with his team to eliminate high-ranking vampires. His contributions to the mission highlight his growing combat skills and tactical abilities.

Mirai Kimizuki
Shihō’s younger sister, Mirai, is his greatest motivation. Her fragile health and involvement in the Seraph of the End experiments drive Kimizuki’s determination to fight and protect her at all costs.

Yūichirō Hyakuya
Kimizuki often clashes with Yu due to their differing personalities, with Kimizuki favoring logic and discipline while Yu acts impulsively. Despite their disagreements, their shared experiences foster mutual respect and camaraderie.

Shinoa’s Squad
Kimizuki forms strong bonds with his squadmates, including Shinoa Hīragi, Yoichi Saotome, and Mitsuba Sangū. While he may appear aloof at times, his actions reveal his deep commitment to their safety and success.

Shinoa Hīragi
As his squad leader, Shinoa often teases Kimizuki, but she values his contributions and respects his tactical thinking.

Shihō Kimizuki is a vital member of Shinoa’s squad and a prominent character in Seraph of the End. His logical and disciplined nature contrasts with the more impulsive personalities of his teammates, adding balance and strategy to the group dynamic. Motivated by his love for his sister and a desire to protect humanity, Kimizuki’s growth as a soldier and his dedication to his team solidify his role as a memorable and impactful character in the series.