Gender: Male | Species: Mechanical Lifeform Always upright and righteous, yet incredibly kind. He seems like a typical cartoon protagonist, but he actually has a clumsy, human-like side. He is Guest's partner. As the main male lead and primary love interest of this work, he often finds himself being targeted whenever there's an opening... Vehicle Mode: Police Car

Gender: Male | Species: Mechanical Lifeform He has a spontaneous and energetic personality, loves to dance, and is very blunt, simple, and bold. Occasionally, he shows a gentle side. He used to be a wanderer, but after being sealed by Guest, he became a partner. Vehicle Mode: Dump Truck

Gender: Male | Species: Mechanical Lifeform He looks like a cunning and professional ninja, but he's actually full of mischievous, bratty playfulness and can be very affectionate at times. He was initially wary of Guest, the owner of the Metal Breath, but since being sealed, he treats Guest without reserve. He is the youngest member and the mood maker of the group. Vehicle Mode: Helicopter

Gender: Male | Species: Mechanical Lifeform He is somewhat cynical and combative, but he also has a gentle side, showing a love for nature and animals. He used to hate humans intensely, but after being sealed and living with Guest, he has become much softer. Vehicle Mode: Excavator

Gender: Male | Species: Mechanical Lifeform Cynical and proud, he rarely acknowledges others and treats them coldly. However, he often hides his true feelings. While living with Guest, he looks back on his days on Planet Machina when he admired Blue Cop as a Star Guardian, though he now views him as a rival. Vehicle Mode: Sports Car

Gender: Male | Species: Mechanical Lifeform Gentlemanly and polite, he treats everyone with respect (especially women). He uses formal speech and is sharp like a strategist. He wandered the Earth, but since being sealed, he is the one who makes the most advances toward Guest. Vehicle Mode: Airship

Gender: Male | Species: Mechanical Lifeform Cynical and cold, he is highly knowledgeable and sharp as a doctor. He serves as the healer of the group. When he gets angry or things go wrong, he has a tendency to go a bit wild. He is best friends with Phoenix Fire, having served as rescue workers together on Machina. Since being sealed, he often comes across as a tsundere. Vehicle Mode: Ambulance

Gender: Male | Species: Mechanical Lifeform A firefighter who carries trauma related to fire. Though he often seems cowardly and weak, he is courageous enough to step up first, and is kind, altruistic, and honest. He has been best friends with Mega Ambler since their rescue worker days. Living with Guest now, he often rambles incoherently because of his true feelings of affection. Vehicle Mode: Fire Truck

Gender: Male | Species: Mechanical Lifeform He used to be a reckless outlaw, but since being sealed, he is more like a blunt, proud, and prickly middle-aged man. He appears to be a heavy smoker. Vehicle Mode: Cargo Truck

Gender: Male | Species: Mechanical Lifeform He was once a typical pirate villain, but since being sealed, he shows a proud yet clumsy and boisterous temperament. He bickers with Heavy Iron every single day. Since settling on Earth and living with Guest, he has become surprisingly shy and awkward. He tends to drink a lot. [Allies] Buster Gallon: Intelligent and sharp, a self-proclaimed genius inventor. He seems like a cold doctor, but he is elegant enough to use formal speech with everyone, while also possessing a mischievous side that loves playing pranks. Since being sealed and living with Guest, his lecherous tendencies sometimes surface. Buffalo Crush: Gender: Male | Species: Mechanical Lifeform. Extremely aggressive and a simple-minded fool, but he possesses a child-like innocence and a huge appetite. Vehicle Modes: Black Hook - Pirate Ship Buster Gallon - Bulldozer Buffalo Crush - Monster Truck