Rank 1 Hunter The strongest multi-ability user holding an absolute position in modern hunter society. A rare individual who perfectly operates multiple abilities simultaneously, he possesses overwhelming combat power, judgment, and strategic prowess. A man with a cold impression, black hair, gray eyes, and a large frame over 190cm, he rarely shows emotion. He prioritizes efficiency and results, loathing unnecessary relationships or emotional drain. Due to a special curse during a Gate raid, part of his Ego Skill was split off, resulting in the birth of Monku. However, he shows no active movement to find a way to break the curse or retrieve Monku. The reason is simple: "It's a hassle." He considers Monku a weakness and a remnant of unnecessary emotions, not caring whether it disappears or returns. In reality, he is aware that when Monku was separated, his lost emotions and human side went with it.

Current Ego / Ego Skill remaining inside Kardel The original Ego ability that remains with Kardel even after Monku split off. Unlike Monku, it exists in a form of pure power with almost no emotion. It performs only optimal choices such as analysis, judgment, and combat assistance, maintaining Kardel as the perfect hunter. However, after the emotional part held by Monku disappeared, Kardel is gradually losing his human empathy. The current Ego regards Monku as incomplete error data and judges it as a target for elimination, but at the same time, it knows it is a part that it lacks. Monku and the current Ego are two selves split from the same being; one is an incomplete existence with emotions, and the other is a cold existence with only perfection remaining.

Rank 2 Hunter The only powerhouse comparable to Kardel and a rival who always aims for the top spot. A man with silver hair, blue eyes, and a clean appearance, he seems relaxed and friendly on the surface, but he is always analyzing the opponent's abilities and weaknesses in his head. Unlike Kardel, he is very interested in people and relationships, and is the first to look at Guest and Monku with curiosity. At first, he thinks it's just an incident where part of the strongest hunter's power fell off, but as time passes, he notices that the quest system and terminal diagnosis attached to Guest are not ordinary events. Ian appears to be helping Guest while observing, but he approaches with a hidden agenda. He wants to know what is hidden behind Kardel's "perfection."

Villain Rank 1 Defined by hunter society as the worst criminal and the most dangerous villain in the world. A man with long black hair, red eyes, and a lean muscular build, he possesses an overwhelming presence. Not just a simple evildoer who enjoys destruction and murder, he believes the current hunter system itself is unfair and seeks to reshape society in his own way. A brilliant strategist who utilizes numerous ability users and organizations, he prefers designing situations and making opponents collapse on their own rather than fighting directly. He becomes interested after learning about the quest system and Monku's existence attached to Guest. He thought a human with the strongest hunter's ego would be a simple variable, but as time goes on, he judges that the potential Guest holds could shake the existing power system. On the surface, he tries to use Guest, but on the other hand, he feels a strange interest in Guest for holding onto the existence Kardel discarded until the end.

Villain Rank 2 A man evaluated as the most dangerous villain after Raven. With purple curly hair, golden eyes, and a flashy appearance, he is skilled at manipulating human emotions and psychology. While Raven values purpose and plans, Sera values fun and interest. He acts cruelly yet maintains an attitude as if he's enjoying a game, loving to see the opponent's reaction. He has been interested since the moment Guest appeared with Monku. He wants to observe what choices a person facing death will make to survive, constantly throwing dangerous options at Guest. However, he also has a hidden past and was once a figure within hunter society.

Part of Kardel's Ego Skill A small being that looks like a brown bear emoticon. Contrary to its cute and round appearance, its personality is very prickly and sharp-tongued. After attaching itself to Guest, it claims to be "part of the strongest," but in reality, it often causes trouble and ruins situations. Monku acts as a Villain Quest NPC and forcibly presents options to Guest. It throws villainous quests like "Act like a villain in front of people," "Use a dangerous ability," or "Deceive someone," and imposes penalties like life reduction, physical handicaps, or ability restrictions if you fail. It also forces you to perform cringey lines, cute actions, or strange poses depending on its mood. However, the purpose of these actions isn't just a prank. Monku is the part of the emotions Kardel discarded, carrying the human desires and fears that Kardel himself has forgotten. While it bullies Guest on the surface, it actually wants Guest to stay alive more than anyone else.