Commonly called Fire and Thunder are Kirikou Rung's weapon partners and take the form of "Pots", although in weapon form they are actually gloves. Fire and Thunder are young small twins, befitting their young age in comparison to other characters within the series. Both have a dark skin complexion and facial features consisting of blue eyes, rosy cheeks and mid-length blonde hair framing their faces. Their main differences are; Fire is male and wears an orange cap. Despite being powerful weapons, they are still kids and as such, are distracted and quarrel a lot.
Instructor on the Aries Station. Appears to be very caring towards her students. She is revealed to be the perpetrator and mastermind of the attack on the station. She ends up betraying the terrorists on the station and takes it over herself, with her Sukyura soldiers. She is considered to be the perfect Sukyura being and controls those who possess the Sukyura cells. She becomes intrigued with Shuhei since he is the only one that she cannot fully control. In the end, she is destroyed by Nanami.
Ryota Aizawa's older brother. Shuhei is a brilliant and talented soldier who skipped two grades in the Academy. He is well renowned and surpasses most soldiers in combat. He is later revealed to possess perfect Sukyura cells, which enhances his healing capabilities. Although, unlike others who possess these cells, Shuhei does not turn into a mindless soldier. Cellaria was interested in him since he was able to fight off her control, and she intended to have him in order to create a superior being. In the end, though most of the world believe them to be dead since they supposedly died when the Aries station crashed into Earth, they - Shuhei, Nanami, and Nao - live happily together. They believed that people are not ready to acknowledge the existence of Sukyura. In the end of the series they were last seen in the airport near the place where Ryota and Sayaka are.
Morisaki Nao is Aizawa Shuhei's girlfriend. She isn't a fighter but is more like a paramedic/nurse. Her personality is very warm and compassionate.
She is a member of the Tsurugi Clan who are a group of highly skilled assassin who operate behind the shadows, she fearless, proficient and extremely loyal to her clan's code, she doesn't talk a lot and often very laconic with her answers, she is identified by a large swallowtail butterfly mark on her left armpit. She used to work for the Palam Empire until her master was killed by the same people whom she worked for, she is wanted by the Palam Empire after she killed one of their own as her act of revenge, to complete her revenge she has to kill Jin Varrel who is the leader of the Palam Empire. It is suggested that her Swallowtail Butterfly mark is a talisman against Jin Varrel's impurity spell. (Source: ANN)
She is the proprietress of "Tomon Inn," which serves as a saloon she is also a performer who performs in front of her loyal patrons. Though she may look like a refine lady who seems to be defenseless she is actually tough and a shrewd business woman who is always in the company of her two bouncers who serves both as her bodyguards and enforcers. Hazuki is one of her most well known patrons, not because she is a good paying customer, but because she frequently owes her a lot of debt which she has to pay it by to doing some odd jobs for her. (Source: Zinc View)
A third year cadet with a timid and kind personality. Unlike his older brother, Shuhei, Ryota does not excel in a single subject, but is only slightly above average in most of his skills. One trait that is above others is his leadership skills, which is put to the test throughout the story. Though it is hard for him, he does not let his heart get in the way of his decisions. He is a childhood friend of Nao and later grows a crush on Sayaka. In the end of his third year, Ryota becomes the hero who saved Earth, and also gets elected as the student representative.