TV-Series
Description
Kyouhei Mizoguchi is a soldier in Alvis, seasoned by multiple conflicts against the Festum. During a survey mission to a new island, he demonstrates attentiveness towards younger colleagues, offering practical advice using relatable examples like fishing. When Festum attack, he acts independently to rescue survivors, extracting Maya Toomi from an assimilated soldier. Following orders from Fumihiko Makabe, he collaborates with Yukie Kariya to activate the Fenrir program, strategically setting the timer for 45 minutes instead of the directed 30 to buy more time. He eliminates encountered Festum threats during their descent.

His role evolves significantly in later operations. Frequently partnering with Maya Toomi, often piloting jets, he acts as her instructor. He assesses her combat maneuvers during exercises, commenting on tactics like the insufficiency of mere speed for overtaking, and agrees to additional practice trials. When encountering an unknown entity later identified as a Human Army transport, he alerts the CDC and guides Maya through the ensuing Festum battle, framing it as her graduation exam and expressing reliance on her skills. A dangerous encounter with a tornado-generating Festum compromises his jet; Maya's intervention provides a critical distraction, enabling his safe ejection. Mitsugu Jinnai recovers him. Saki Masaoka later reprimands him for perceived irresponsibility, to which he responds with a lighthearted apology.

He contributes to strategic discussions at Alvis, advising against deploying Miwa Hino alone to the Mir and later accompanying the team to the core location. In subsequent meetings, he analyzes operational matters like new core integration, emphasizing battlefield testing necessity.

Advancing to command, he leads the L-Boat during the Fifth Operation Azure, ordering shield deployment to breach the battlefield and deploying Fafner units upon arrival. He also manages the CDC during the expeditionary force's return after retrieving Soushi Minashiro, preferring active duty over base monitoring.

He observes critical deliberations concerning Thunderstrike deployment against the potentially hostile Mark Nicht piloted by Soushi Minashiro. Following the attack, he voices frustration and suspicion about Soushi's return as a security risk to Fumihiko Makabe and Kenji Kondou. After the battle, he displays visible dissatisfaction, sighing deeply when Kyousuke Mizoguchi places a hand on his shoulder. He participates in the response to Maris Excelsior's attempt to remove Soushi.

Leading a jet squadron against Benon forces, his craft is initially shielded from worm spheres by Ashoka's leaves. Witnessing Shouhei Kishi's death provokes an aggressive counterattack against the Festum swarm. The next day, he locates a photograph from Shouhei's cockpit, facilitating its passage to Fei Kishi via Kenji Kondou. At Shouhei's funeral, he directly blames Soushi for compromised information leading to casualties, walking away angrily after their confrontation. Despite tension, he participates in greeting Maris Excelsior that night and fulfills duties during Second Plan L execution, monitoring enemy movements near the boat. After the crew's safe return to Wadatsumijima, he apologizes to Soushi following Soushi and Miwa Hino's identification of Rina Nishio as the enemy tracking vector. He joins the pre-operation gathering for the Sixth Operation Azure.

After the Sixth Operation Azure's success, he visits Ryouhei Douma's restaurant on Tatsumiyajima with Douma and Mai Douma, observing a poster of Hiroto Douma. Several days later, he accompanies Maya Toomi and Saki Masaoka to greet Alexandra Gallop. Approximately a month later, he attends the Tanabata Festival, observing the lanterns. He is stationed at the CDC when Kazuki Makabe and Kouyou Kasugai depart Tatsumiyajima.

His personality blends outward relaxation with sharp observation and strategic aptitude. He exhibits a laid-back demeanor during downtime, like lying on the beach or observing clouds, while remaining highly perceptive of his surroundings. He possesses strong people-reading skills, quickly discerning others' true intentions. He shows protective, almost paternal regard for Maya Toomi, actively organizing missions to serve as her bodyguard and providing combat instruction. He strives to understand her emotional state, alleviate her sadness, and displays visible pride in her accomplishments. He maintains a generally friendly disposition.

Physically, he has dark brown hair and brown eyes.