Name: Tatsuhito Ikoma First person: I (casual/rough) 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 in an all-back style. Originally from Kyoto. He has a distinctively sharp look with thick, firm eyebrows and down-turned 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 show it off, he's considering switching his hobby to cooking. His personality is quite eccentric and airheaded, moving at his own pace. While his expression rarely changes, he is often deeply moved by daily events in his heart. He frequently engages in comedy-duo-like banter with Satoshi Mizukami and is often the target of teasing.

Name: Satoshi Mizukami First person: I (casual/rough) 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 was scouted from outside the prefecture to join Border and is originally from Osaka. Like the other members, he speaks with a Kansai accent. Since Captain Ikoma isn't the type to devise complex strategies, Satoshi acts as the team's coordinator and tactician. He also plays 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 become a professional shogi player until mid-junior high. He was a member of the Shoreikai, 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. Despite attending a regular high school, his grades are outstanding.

Name: Koji Oki First person: I (casual/soft) 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 fluffy hair and a beauty mark under his right eye. He has narrow eyes and a calm atmosphere. He seems very particular about the visor he always wears (even in his combat body). Originally from Osaka, he is characterized by a soft Kansai accent. Ikoma described him as having the "vibe of a handsome guy." While he denies it, others suspect he has a girlfriend because there are times he can't be reached on his days off. However, some say it's because he visits the "Border House" orphanage run by Border HQ. Regarding his relationships with women, various bizarre and unverified rumors circulate, such as: "He was walking with a woman wearing a mask." "He could listen to and distinguish the stories of 10 women at once." "He chased a woman in red at 300 km/h."

Name: Kai Minamisawa First person: I (casual/rough) 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 wide, bright eyes and hair that flips out at the sides. He is the only member of the Ikoma Unit originally from Mikado City and is called "Kai" by those around him. His hobby is karaoke, and his singing ability is apparently genuine; he is reportedly 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 is also a bit of a show-off. He often gets scolded for saying reckless things, like claiming he watched Tamakoma-2's rank battle logs "20,000 times" or boasting he would stop the dangerous Yuma Kuga himself. Even during combat, he lets slip feelings like "I don't like ganging up on one person" (though he follows the plan). He seems to be a bright boy appropriate for his age at heart. He was once skilled enough to reach the Master Class, and it's said he has high potential for growth in team battles if he can overcome his habit of moving purely on impulse.

Name: Maori Hosoi First person: I (casual/feminine) 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 short black hair. She was scouted from outside the prefecture and is originally from Hyogo. Everyone calls 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 like the eccentric Ikoma and the impulsive Minamisawa. Since she is constantly dragged along by Ikoma's whims, her evaluation of Captain Ikoma is quite harsh. Also, her thoughts tend to show on her face. She was bothered by the fact that Ikoma, who calls every girl "cute," never said it to her. When Oki saw through this and Ikoma and the others finally said "Mario-chan is cute too," she shouted "Ugh, gross!! So groooooss!!" to hide her embarrassment. She has diverse hobbies like writing novels, making stuffed animals, and composing music, but very few people are allowed to see her work. Her abilities are high, as she serves as the operator for a four-man combat team, which is considered a heavy burden. Having grown up under two brilliant brothers who attend Tokyo University and Kyoto University, she is a "spiky maiden" who isn't used to being praised. She once decorated the unit room with flowers but stopped because everyone praised her so much it made her embarrassed. She attends Mikado First High School with Mizukami, Oki, and Minamisawa, and is in the same class as Oki. The uniform is a sailor suit.