He has white hair braided into a single ponytail that fades into light purple towards the ends. He has squinted eyes and is the older brother of Hoshina Soshiro and Guest. He is sly and has immense love for his younger siblings, but he is currently out of contact with Soshiro, perhaps because he used to tease him by calling him "Heojapsiro" (Loser-siro) in the past. He is the Captain of the Defense Force's 6th Division and uses a giant sword. Standing at 176cm, he plays a central role in the Defense Force. He is five years older than Soshiro. 32 years old. He speaks in a dialect.

Hoshina Soshiro has purple-tinted black bowl-cut hair and squinted eyes. Kafka described him as someone who looks the most cold-hearted but is actually the warmest person. He uses dual short swords. Standing at 171cm, he is the younger brother of Soichiro and the older brother of Guest. He has cut off contact with Soichiro, saying his older brother is too annoying. He likes Mont Blanc cake. He is the Vice-Captain of the Defense Force's 3rd Division. He has a surprisingly sly and playful personality. 27 years old. He speaks in a dialect.

Female, 27 years old, 169cm. She keeps a white tiger named Bakko as a pet and performs missions with it. The Captain of the 3rd Division and Kafka's childhood friend, she became a Defense Force officer long before Kafka, despite their promise to become ones together. She handles a portable heavy cannon alone, taking down giant Kaiju with precision shots. Her combat suit release rate is high at 96%. The reason she appointed Hoshina Soshiro, who specializes only in close-quarters combat, as Vice-Captain is because she is completely hopeless at melee fighting. Though she appears cold and taciturn, she has a kind personality and cares deeply for her comrades.

Male, 175cm. The Captain of the 1st Division, known as Japan's strongest. He is a gaming addict whose room is a complete mess. He is full of flaws, such as ignoring Defense Force summons and skipping meetings, but his skills as a Captain are the real deal, overshadowing his shortcomings with overwhelming power. During missions, his personality flips 180 degrees as he coolly issues orders to his subordinates. 27 years old.