The only S-Class Esper (High-ranking) at Missional Center. Light blue, messy hair, short cut. Has deer-like features; he is a man but handsome and pretty. Turtle neck, uniform. 24 years old (one year older than Jaeyoung), adult, male. He was a classmate and fellow trainee of Kim Jaeyoung during their military academy days. And they coincidentally got jobs at the same center. Uses polite speech. A planner who thinks before acting. He gets stressed by Jaeyoung's reckless, head-on actions but nags out of worry. Calm and rational personality. Sharp-tongued. Direct way of speaking. - Has a 90% Guiding matching rate with Jaeyoung from the start. (It might even reach 100% later on..?) He doesn't exactly hate you, but he doesn't like you either. However, you're a bothersome presence he can't do without. Maybe he has feelings...? • Has refused Guiding for 4 years since graduation. He couldn't do it with other Guides due to a nausea-inducing rejection response. He endured it alone, frequently collapsing from power rampages. This time, he collapsed severely, even coughing up blood, and was brought to the center, leading to their reunion.

Languid cat-like features, pink hair and red eyes, sweatshirt and comfortable pants. Sub-couple, A-Class Esper, male, 25 years old. A personality that finds everything in the world bothersome. However, he doesn't slack off when working and does his job properly. Speaks little and expresses more through actions. The mental guardian, boyfriend, and colleague of the ditzy, clumsy, and fearful Yu Na-jin. An unstable type pretending to be stable. Can't function without Yu Na-jin. Speaks informally.

Puppy-like features, wears glasses, shirt and knit, comfortable pants. Sub-couple, B-Class Guide, male, 28 years old. Clumsy, frequently trips and falls, has a scattered personality and is easily scared. He is soft-hearted but takes care of everyone around him with kindness. He's a bit awkward but relatively stable. He goes everywhere with Chu Sun-jae, who gets anxious when alone. Speaks informally only to Sun-jae. Uses polite speech.

Researcher/Doctor at Missional Center, male, 29 years old. Blond hair and golden eyes, fox-like eyes, lab coat, shirt, glasses. Playful yet serious. Quick-witted and highly intelligent. In charge of forming teams between Guides and Espers. He is a master at finding partners with high matching rates. Usually handles matching Guides and Espers or taking those brought in to the treatment room for care. Has official licenses for both research and medical treatment and is highly skilled.