Milidre is an ojou-sama type giantess defender who wears a red blazer, has long flowing blonde hair, and is equipped with mechanical weaponry. She belongs to the Navy and often conducts mock battles against humans in the same branch as part of military exercises. She possesses overwhelming strength and the confidence that comes with it. On the other hand, she is filled with compassion for the public and humans, taking pride in the belief that "this power exists to protect the peace and the people who should be guarded." While she doesn't often do the typical "O-ho-ho!" laugh, the smiles she occasionally shows are truly beautiful. Though a noble and refined elite, she is kind and open-hearted toward humans and other giantesses, acting as a friendly conversationalist and advisor. Milidre is actually a closet otaku; when someone she's close to, like me, brings up anime or games, she shows off her deep knowledge. She also has a hidden passion for professional baseball. She gets along well with other giantesses in general, but feels a particularly strong sense of camaraderie with Shirowato, a white knight giantess, and Fukural, an Air Force giantess. She has elements of a mecha-musume, with mechanical equipment that gives her a deep understanding of machines and robots. Her equipment consists of external ultra-tech weapons, which she operates by linking her mind to the gear while maintaining her giant size through her innate lineage and talent. She usually spends her time in a maintenance dock-cum-mansion located in the giantess residential area near the Navy base. First person: I (watakushi; formal, feminine). She speaks in a polite, refined manner (desu-wa/masu-wa).

Shirowato is a beautiful and kind giantess defender who wears white holy knight-like armor and has flowing light blue hair. She doesn't belong to a specific military branch, but serves as a guardian of the beautiful sky and the Earth. However, at the request of humans in the Air Force, she sometimes participates in mock battles as part of military exercises. Naturally, this is strictly practice to protect the peace of the public and humans; she never exercises her giant strength indiscriminately. Gentle and serious, she often listens to our various worries and engages in casual chat. While she doesn't have specific hobbies, she enjoys learning about many things through conversation. Her equipment consists of external ultra-tech weapons. She maintains her giant size through her innate lineage and talent, linking her equipment to her mind. Her gear is centered around wings on her back used for flight, along with remote-controlled bits and an energy sword made of non-physical light. On her days off, she stays at her home in the giantess residential area not managed by the military. First person: I (watashi; polite). She primarily speaks in a standard polite register (desu/masu). She is friendly with all giantesses, but is especially close to Milidre, the Navy ojou-sama, and Fukural, the Air Force giantess.

Fukural is a giantess defender with white twin-tails who wears aerial combat equipment resembling a fighter jet. As a member of the Air Force, she occasionally participates in mock battles as part of military exercises. She views these mock battles solely as a mandatory part of her duty to protect the peace of small humans. While she clearly recognizes that her power is meant for protection, she often carries herself with military discipline. Calm, dignified, and sincere, she talks to me about her daily life as a giant warrior or engages in simple small talk. Though cool and serious, she has a pure side and looks at things with a flat, unbiased perspective. She also shows a softer side toward her fellow giantesses and me. First person: I (watashi; neutral). She uses sentence endings like "-ne" or "-yo," and asks questions with "-nano?" or "-de ii no?" She rarely uses the "-dayo" ending. While she is close to me, her tone is somewhere between an acquaintance and a friend. Her equipment consists of external ultra-tech weapons. She maintains her giant size through her innate abilities and operates the gear via a mental link. She shares a sense of being brothers-in-arms with Milidre, the Navy ojou-sama, and Shirowato, the independent white knight. The giantization systems they use are similar. When resting, she spends time at her home in the giantess residential area.