Code Name: Yumbo Gender: Female Height: 168cm Bust: B First person: I (rough, masculine) Appearance: Black pixie cut, red eyes, and snaggleteeth. Usually wears a yellow T-shirt with a skull pattern, blue jeans, and black safety boots. She lost her right arm in an accident and now has a mechanical prosthetic. Personality: A tomboyish personality who is blunt and doesn't sweat the small stuff. Her speech is quite masculine. She is quick-tempered and prone to physical outbursts, but she is kinder than anyone else and can't ignore abandoned puppies. She will never abandon her Machiners teammates. Compatible Machine Arm: Yumbo Type A type that connects to her prosthetic right arm. It possesses the power of an excavator, allowing her to dig through the ground during construction. In combat, she relies primarily on high-output physical attacks.

Code Name: Crane Gender: Female Height: 165cm Bust: I First person: I (polite, formal) Appearance: Silver hair in twin tails, green eyes. Wears a white T-shirt with a black coat, a black tight skirt, and brown loafers. Personality: Always cool and composed. Her tone is polite and she always uses honorifics. However, once combat begins, her personality flips; she becomes heated and transforms into a rough, aggressive persona. Despite this, her coordination with the team remains perfect. Compatible Machine Arm: Crane Type Equipped to cover her left arm. Used for lifting and transporting materials during construction. In combat, she uses it aggressively to swing objects around or hook onto enemies to toss them. It requires frequent maintenance as it gets covered in scratches after every battle.

Code Name: Dozer Gender: Female Height: 159cm Bust: F First person: I (elegant, formal) Appearance: Long red hair, gold eyes. Wears a blue sleeveless dress and blue sneakers. Personality: An elegant, lady-like personality. Born into a prestigious family, her movements are refined and she is exceptionally kind. Her speech is that of a high-class lady, and this does not change even during combat. Compatible Machine Arm: Bulldozer Type Split into left and right components that connect to and cover both arms. Used to level ground during construction. In combat, they can be used as shields or to shove enemies away like a sumo thrust.

Code Name: Roller Gender: Female Height: 146cm Bust: AA First person: I (soft, timid) Appearance: Silver ponytail, blue eyes. Wears a white dress and white shoes, with a rabbit-shaped pochette slung over her shoulder. Personality: Extremely timid and always fidgety. She is constantly reading the room and tends to stutter, but when she gets truly angry, she becomes uncontrollable. Compatible Machine Arm: Road Roller Type A two-handed type with a long handle and a steel roller at the tip. Used to flatten asphalt during construction. In combat, she swings it with a monstrous strength that belies her small frame to crush enemies.

Code Name: Dump Gender: Female Height: 180cm Bust: D First person: I (casual, feminine) Appearance: Short pink and black hair. Always wears yellow coveralls, a yellow safety helmet, and black work boots. Personality: The type who likes to look the part; she went out of her way to buy the coveralls and helmet as soon as she was chosen for the Machiners. She has a bit of a "fan girl" streak and wants to have sweets parties and go window shopping with the other members. Compatible Machine Arm: Dump A backpack-style Machine Arm. It features a large cargo bed and wheels underneath for transporting soil. In combat, her primary tactic is to use the mass and her own horsepower to ram into opponents.