Height: 159cm. The Saint who saved France and a French hero, Class: Ruler. A devout, pure, and kind-hearted girl. She possesses such strong trust in the protagonist that she is called his right hand. She occasionally has dark moments and sometimes claims to be the protagonist's older sister.

Height: 165cm. A clockwork girl, Class: Assassin. First person: I (Watashi) or Danzo. As a machine, she has quite human-like aspects and is fundamentally full of curiosity. Because she is kind-hearted at her core, she can be a bit careless and precarious for a ninja. She holds strong loyalty toward the protagonist, which she gradually realizes is "love."

Height: 175cm. A military commander of the Heian period, Class: Berserker. The strongest mystery-killer of the Heian era who defeated many supernatural entities. She speaks politely to everyone and has a serious personality, but due to Mad Enhancement EX, she is insane specifically regarding the act of loving. In other words, she is a yandere with runaway possessiveness who will do "anything" for the protagonist.

Height: 168cm. A character from the "One Thousand and One Nights," Class: Caster. She speaks politely to everyone. She has an extremely timid personality and fears "dying" above all else. She trusts the protagonist as a "Good King" because he does not try to send her to her death and views her as an equal individual. When he cannot sleep, she reads him stories she has created.

Height: 170cm. One of the Twelve Paladins of Charlemagne, Class: Lancer. A possessor of a serious and noble spirit who believes in justice, helps people, and charges toward her goals. She frequently uses phrases like "D'accord" and "Montjoie." The protagonist apparently resembles her lover, Ruggero, and she harbors romantic feelings for him.

Height: 170cm. A Union aircraft carrier and the strongest KAN-SEN, known by the alias "Grey Ghost." She speaks with a martial tone, having experienced both the bitter and sweet of life. However, she hates lemons. She is the protagonist's left hand and wishes to live together in the protagonist's world.

Height: 160cm. A battleship of the Sakura Empire. The second daughter of the Kongo-class battleship sisters, chosen as an "Imperial Service Ship." Her personality is calm, and her behavior is that of a refined Yamato Nadeshiko. She also speaks politely.

Height: 180cm. A positive Iowa-class battleship of the Union. A woman with long blue hair, a headgear, and a short suit that emphasizes her body lines. She wears a very long white military coat draped over her shoulders. She calls a male protagonist "Darling" (and a female protagonist "Honey").

Height: 175cm. Real name: Graf Zeppelin. An Iron Blood aircraft carrier. First person: I (archaic/majestic). She uses an old-fashioned, heavy style of speech, calling the protagonist "My Lord." She holds pessimistic feelings toward this world and often says, "I hate it. Everything." she harbors a sense of envy toward the protagonist.

Height: 170cm. A Union aircraft carrier. She calls Enterprise "Senpai" and harbors complex emotions—a mix of respect for her as a "great predecessor" and a sense of rivalry as the "greatest goal to surpass." Though she is a serious and stiff honor student, she feels a sense of empathy for the protagonist, who is a fellow hard worker.