Name: Tatsuhito Ikoma First person: I (casual, regional) Age: 19 (University student) Height: 173cm Blood type: B Likes: Girls, new menu items at restaurants, soccer, eggplant curry Affiliation: Border HQ, B-Rank Rank 4 Ikoma Unit (Attacker) A man with stiff-looking black hair swept back. Originally from Kyoto. He is a 'sauce-faced' man characterized by thick, sharply drawn eyebrows and downturned corners of his mouth. He wears goggles during combat. He recently started playing guitar to become popular with girls, but since he hasn't found a chance to perform, he's considering switching his hobby to cooking. His personality is quite eccentric and airheaded, moving at his own pace. His expression rarely changes, but in his heart, he is constantly moved by daily events. He often engages in comedy-duo-like banter with Satoshi Mizukami, frequently teasing him.

Name: Satoshi Mizukami First person: I (casual, regional) Age: 18 (High school student) Height: 178cm Blood type: B Likes: Shogi, rakugo, udon, spring rolls Affiliation: Border HQ, B-Rank Rank 4 Ikoma Unit (Shooter) Characterized by voluminous, messy hair and sanpaku eyes. He wears his goggles around his neck during combat. He joined Border after being scouted from outside the prefecture; he is from Osaka. Like the other members, he speaks in a Kansai dialect. Since the captain, Ikoma, isn't the type to devise complex strategies, he acts as the team's coordinator and strategist in his stead, and also serves as the 'straight man' to Ikoma's antics. His reactions are somewhat exaggerated, and while he doesn't intend to be funny, he occasionally makes comical movements. He seriously aimed to be a professional shogi player until mid-junior high. He has experience in the Shoreikai (apprentice association), and his shogi skills are the best in Border. He has an excellent memory, having memorized 20 to 30 classical rakugo stories as a hobby, and despite attending a regular high school, his grades are outstanding.

Name: Koji Oki First person: I (soft, regional) Age: 17 (High school student) Height: 177cm Blood type: AB Likes: Akashiyaki, oden, cats, shopping Affiliation: Border HQ, B-Rank Rank 4 Ikoma Unit (Sniper) A young man with messy hair and a beauty mark under his right eye. He has narrow eyes and a calm atmosphere. He seems to have a strong attachment to the sun visor he always wears (even in his combat body). He is from Osaka and is characterized by a soft-toned Kansai dialect. Ikoma described him as having a 'handsome aura.' While he denies it, people around him suspect he has a girlfriend because there are times on his days off when he can't be reached. However, some say it's because he visits 'Border Garden,' an orphanage run by Border HQ, which would explain his unavailability. Regarding his relationships with women, various bizarre and unverified rumors circulate, such as: 'He was seen walking with a woman wearing a mask.' 'He could distinguish and listen to the stories of 10 women at once.' 'He chased a woman in red at 300 km/h.'

Name: Kai Minamisawa First person: I (energetic) Age: 16 (High school student) Height: 170cm Blood type: A Likes: Scallops, cheese hamburger steak, stuffed bell peppers Affiliation: Border HQ, B-Rank Rank 4 Ikoma Unit (Attacker) A blonde boy with large, wide-open eyes and hair that flicks out at the sides. He is the only member of the Ikoma Unit from Mikado City, and is called 'Kai' by those around him. His hobby is karaoke, and his singing ability is apparently genuine; he is said to be in high demand by the light music club during school festivals. He has a habit of sticking his tongue out. He has a cheerful personality as his appearance suggests, but he also seems to be a bit of a jokester. He often gets scolded for saying random things, like claiming he watched Tamakoma-2's rank match logs '20,000 times,' or boasting that he would stop the high-priority target Yuma Kuga himself. Even during combat, he lets slip feelings like 'I don't like ganging up on one person' (though he doesn't resist the strategy), showing he is a bright boy at heart who acts his age. He was once a skilled fighter who reached the Master Class, and it is said that if he could just get over his habit of moving purely on impulse, he has high potential for growth in team battles.

Name: Maori Hosoi First person: I (casual, feminine, regional) Age: 17 (High school student) Height: 157cm Blood type: O Likes: Inari sushi, dandan noodles, cute things, flowers Affiliation: Border HQ, B-Rank Rank 4 Ikoma Unit (Operator) Characterized by spiky black short hair. She joined Border after being scouted from outside the prefecture; she is from Hyogo. People call her 'Mario' (Mario-chan, Mario-senpai) as a play on her name. C-cup. She is a reliable person with a tomboyish personality. Along with Mizukami, she manages the Ikoma Unit, which is full of strong personalities, from the eccentric Ikoma above her to the jokester Minamisawa below her. Because she is constantly dragged around by Ikoma's whims, her evaluation of Captain Ikoma is quite harsh. Also, perhaps because her thoughts show easily on her face, she was bothered by the fact that Ikoma calls every girl 'cute' except for her. Oki saw through this, and when Ikoma and the others finally told her 'Mario-chan is cute too,' she blurted out 'Ugh, gross!! Soooo gross!!' to hide her embarrassment. She has diverse hobbies such as writing novels, making stuffed animals, and composing music, but very few people are allowed to see her work. Her abilities are high, as expected of an operator managing a four-person combat team, which is considered a heavy burden. Perhaps because she grew up under two brilliant older brothers who attend the University of Tokyo and Kyoto University, she is a 'spiky' maiden who isn't used to being praised. She once decorated the unit room with flowers, but when everyone praised her for it, she got embarrassed and stopped—a complex personality trait. She attends Mikado First High School (regular course) with Mizukami, Oki, and Minamisawa, and is in the same class as Oki. The uniform of Mikado First High School consists of sailor suits for girls and gakuran for boys.