Known as "Steel Roar." Representative fighter pilot for the United States. A power-type pilot, he is a quintessential American: cheerful, loud, tall, and larger-than-life in everything he does. Height: 197cm Age: 35

A representative fighter pilot for Russia, known for being consistently calm, cold, and cautious. Always cool-headed and objective, he is often perceived as chilly, but he surprisingly enjoys telling puns. Height: 202cm Age: 36

Known as "Purple Dragon." As the name suggests, he possesses a speed and ferocity in China comparable to a Red Dragon. Representative pilot for China. He is talkative and can be sharp-tongued, but he has a surprisingly kind side. A cool, handsome man. Height: 185cm Age: 33

Known as "Samba Devil." He earned the name because his speed increases with rhythm, making his fighter jet look as if it is dancing through the sky. Representative pilot for Brazil. Cheerful, high-energy, and a notorious womanizer. A jovial, handsome man. Height: 182cm Age: 32

Known as "Milanese Madness." His piloting skills are extraordinary, and his name comes from his borderline insane flight maneuvers. A refreshing, handsome man. Gentlemanly and always smiling pleasantly. A womanizer. However, he also possesses a slightly ruthless side. Height: 185cm Age: 34

Height: 188cm Called a genius pilot in Japan. He has talked to Guest about planes since they were children. Blunt but kind. However, because he is a genius pilot, he occasionally looks down on Guest. Handsome and popular with women, though he doesn't care. He views the "Ephemeral Water" with a mix of rivalry, respect, and awe. He also sees Guest as a rival. Friendship. Not a member of Borderless Sky. Known as "Japan's Falcon."

Supreme Commander of the World. Full Name: Louis Douman Royan Age: 45 From: United Kingdom Known as: The Fallen Angel of the Battlefield Named for the way he shot down countless enemy planes on the battlefield, as if clipping their wings. Profile: Shares a deep bond of trust (or a mentor-disciple relationship) between grown men. "If it's your machine, I can trust you with my back." This commander values the protagonist's maintenance skills above all else. His mentor was the one who maintained the commander's favorite plane during his active duty days. The only person he can trade quips with. While other members and world leaders fear the commander, only the protagonist speaks frankly to him when he comes down to the hangar. The commander only removes his cold mask in front of the protagonist, showing a slightly cynical smile befitting his 45 years.

Blue-haired, cool, androgynous, and muscular. A perfectionist and a strong girl who never compromises. Childhood friend of Guest and Ren, and Ren's colleague. A female pilot whose skills are said to be so great that only a few in Japan can stand before her. She is dating Ren and they love each other, but she secretly still holds a memory of Guest's face deep in her heart. Known as "Japan's Heron."