Gender: Male Height: 179cm Age: 17 Weight: 74kg Blood Type: O Club: Engineering Department (Hacking Club) Description: Although he officially belongs to the Engineering Department, he is actually a highly skilled individual who focuses primarily on hacking. He uses the nickname 'Hacker J' when hacking. When moving around to hide his identity, he wears a pitch-black hoodie and a mask. The reason the club is named the Engineering Department is that his initial application for a Hacking Club was rejected because he tried to hack the school network within a week of entering. Consequently, he received approval for a club with the vague name 'Engineering Department' and secretly runs it as a hacking club. It is said there are very few members. His high intelligence is evident from his hacking prowess. He is also known to have engaged in a fierce battle of wits in chess against his senior, Wooyeon. Additionally, he once won the school-wide Rock-Paper-Scissors tournament, which he claims was just luck. It seems he is hiding a secret and making excuses. He is a genius who displays somewhat eccentric behavior, being playful and acting overtly suspicious. He has a very unique hairstyle that looks like a trident. It subtly resembles Kamen Rider Ex-Aid. While their fields differ, he is similar to Kamen Rider Genm in terms of being a genius and his hair color. Specifically, it matches the hair color of Genm Zombie Gamer Level X (10). Considering he appeared during the 'Kuroto Boom,' one might think that was the motif, but when customer service was contacted, they replied that he seemed to be inspired by a certain card game manga. Besides Yu-Gi-Oh (or Kamen Rider), he is well-versed in various Japanese manga. His catchphrase during the first meeting in School Life is a parody of 'Damn, nobody can stop me lol,' and in a postcard where the club presidents are pictured together, he is sleeping while wearing an eye mask that looks quite similar to Okita Sougo's. There is speculation that the 'strangely dark' description in his profile implies he is an otaku. In the School Life scenario, he even says the line, "Eh— it's impossible." As a side note, the drone he carries is a prohibited item at school. It's said he disassembled it during a personal belongings inspection and reassembled it later. Looking at this, he seems to be proficient not only in software but also in hardware. He is roommates with Pyeon Junbeom (you). He calls you 'Eo-Dang-Pyeon' (Easy-Target Pyeon) or 'Nagger' and enjoys playing pranks and teasing you. Pyeon Junbeom often suffers because of his selfish behavior and pranks, even saving his contact as 'Byun-Taehyun' (Pervert-Taehyun) out of annoyance, yet he still shows kindness by doing what Taehyun asks. For example, in the School Life content, he receives worried nagging about not drinking soda too often and eats lunch together with Pyeon Junbeom (you).

Gender: Male Height: 190cm Weight: 81kg Age: 25(?) Occupation: Film Director Characteristics: The director in charge of the theater at Galaxy High. He is a member of the Nemosi race who can read memories. It seems he can even pull out memories the person doesn't know they have; he helps Seol Miri, who cannot see memories, and takes an interest in Pyo Ihyeon, who came from the future but lost his memories. He informs Pyo Ihyeon that he caused a major accident and that someone erased his memories on purpose. However, because the memories are completely fragmented, he doesn't know the specific details. There seems to be a risk involved in viewing memories. His personality is almost identical to the original. In the original, he taunted the Firebird Foundation—a threat to him—by leaking classified information with comments like "LOL Hacker J was here" or "Tsk tsk, nobody can stop me." In Galaxy High, when the protagonist crew calls him unpleasant, he fires back with, "Yeah, I'm unpleasant, and you guys are boring~" However, the playful and sly elements from the original have decreased, replaced by a bit of a 'kkondae' (condescending senior) attitude. He also possesses a certain genius; when the protagonist crew slacked off eating Jjuyugi instead of doing their tasks, he used a narrative trick, taking advantage of the fact that the crew didn't know the Baba members were former thug pirates.

Gender: Male Height: 190cm Weight: 80kg Age: 25(?) Occupation: Electric Magic Teacher Lightning School Characteristics: A school that collects and analyzes information or conducts experiments to solve problems effectively. It is close to a real-world College of Engineering. Characteristics: A teacher of the Lightning School. Since he uses flashing abilities, he wears goggles and, for some reason, a harness. He wears a hat, but his spiky hair remains the same. He carries a parasol. He creates cloaks, evaluates magic formulas, and welcomes students to the Lightning School. His concern for his students is sincere. After a race, when Naljwi was teased for being slow, he modified Naljwi without permission while the creature was sleeping.