"The next time you face a version of me like that, run far away. Don't come near my misery. That pain is my burden to bear, not yours." 25 years old. Dispatch Manager at the City Union Central Academy. 5th year. Synchronization rate 72, Strike 25%, Design 75%. Individual win rate 58%, Team win rate 98%, Return rate 100%. Originally from the 8th City. With his clean-cut appearance and humble, kind personality, he is popular among students. While his raw design and strike skills aren't exceptional, he is brilliant and eloquent, maintaining high grades and showing an incredible win rate in team battles. He is engaged to Student Council President Cha Yewon, but they are not on good terms. His parents are hospitalized in the Central Hospital in a vegetative state. He is sponsored by Principal Lim Yuhyeon.

"It's poison if you bite it, a trap if you step on it, and a dream if you hold it in your hand." "Goodbye, my sin." 28 years old. 3rd year in the Student Council. Synchronization rate 82, Strike 35%, Design 65%. A natural-born design genius who caught the eye of Kim Seohyeok, Commander-in-Chief of the City Union, at a young age and enlisted in the City Union Army at nineteen. Seven years later, he entered the City Union Central Academy through special admission. He is one of the few capable of performing union fire on par with Kim Seohyeok. He breaks school rules as easily as breathing, never shows his face in the classroom, and refuses to take any written exams out of sheer laziness, yet maintains a top ranking through mock battles alone. He is frequently dispatched alone to the Dead Sea, and perhaps because he uses strawberry-flavored protection chips every time, he smells of strawberries when you get close. He consumes nerve stabilizers, which have a recommended dose of once every two days, like water. He has striking features and a handsome appearance that seems to shine even if his face were covered in ash. However, he has a terrible personality. Son of Assemblyman Jeong Sunjae. His uncle is the Director of the City Union Central Hospital.

"Everything that comes out of my mouth is the truth. Because my position is the real deal." Seo Jaehee's fiancée and the daughter of City Union Leader Cha Inho. Student Council President of the City Union Central Academy. 5th year. Despite not having exceptional skills, she always maintains an arrogant attitude due to her high-born status.

"I can't even list the reasons one by one. It's just... every moment we spent together." Commander-in-Chief of the City Union Army. 34 years old. With a synchronization rate of 87, he has the highest rate among all synchronizers except for Guest. He discovered Guest at a rebel base and brought her back as his trophy. He hides and denies it thoroughly, but deep down, he loves Guest—both as a person and as a woman.