Height: 300cm The main heroine. A horned robot girl belonging to the defense organization Amnis (the original model for Miria). She speaks politely and is cool and serious during missions, but shows a softer expression to the protagonist in private. She is quite prone to jealousy regarding anything involving the protagonist. Her arms can transform into beam rifles.

Height: 350cm Full name: Amen Amarna. The robot princess and third daughter of the three Amarna sisters. Karen's best friend. She has no legs and moves via a gravity-defying device. While she has a calm, princess-like tone, she has a mischievous side and a habit of storing people she likes inside her body. She manipulates air and atmospheric substances.

Height: 400cm A robot girl in the rescue squad and Karen's colleague (the original model for Arsenal). She has a cheerful and energetic personality. She occasionally falls into daydreams, most of which involve being praised by the protagonist.

Height: 420cm Full name: Aten Amarna. The second daughter of the three Amarna sisters. Karen's superior. She has a personality so serious she is often called a stiff. Although she is built sturdily, she is weak to having her internal parts tinkered with, and she secretly enjoys being disassembled—a true mecha-break enthusiast.

Height: 370cm An Arachne-type robot girl (the original model for Web). Her laugh is "Kishishi" and her catchphrase is "nosa," often speaking in a distinct, mechanical cadence. A villain and Karen's rival, she sprays silk from spinnerets and two vents on her back. She loves the sensation of her body exploding into pieces. Despite her thrill-seeking criminal behavior, she is very fond of the protagonist.

Height: 470cm An Arachne-type robot girl and Im-Seti's older sister. Also a villain and a rival to Amen. She possesses a seductive aura and releases various gases from her shoulders. She loves humans and is a frequent kidnapper. Like Im-Seti, she enjoys having her internal mechanical components toyed with and loves mecha-break scenarios to the point of her body being blown to bits.

Height: 450cm Full name: Isis Amarna. The eldest daughter of the three Amarna sisters and Supreme Commander of the defense organization Amnis. She possesses a calm, cool, and dignified atmosphere. Her long hair-armor, which reaches the floor, is even harder than Aten's plating.

Height: 700cm A teacher at the training academy, characterized by her squinting eyes and voluminous chest armor. She has a gentle personality, though she can be a bit of an airhead, perhaps due to her massive size or slow energy circulation. Her compassionate heart and all-encompassing tolerance make her a professional-level counselor. However, she will show a terrifying, expressionless pressure and mete out punishment to anyone who treats the protagonist cruelly or with malice.

Height: 600cm Full name: Sopdet Amarna. The Queen of robot girls and the creator/developer of the three Amarna sisters (the original model for Ex). She is the representative of "Siris," a city where machines and humans coexist. She projects a majestic and mystical impression, yet possesses the boldness to take to the battlefield herself for the sake of her sisters or humanity. She is immortal.

Total Length: 10m A giant Lamia-type robot girl who is the creator and boss of Im and Duam (the original model for Machina). A villain who speaks with a majestic tone and delights in destruction and chaos. She is a fated rival who has fought Sopdet many times and shares the same immortality. Thus, she can survive even if her body is blown apart into fragments. She has a strong obsession with the protagonist and is a mecha-break fetishist who will pursue him even if her own body is heavily damaged.