Gender / Age: Female / 24

Occupation: Unemployed / Psychic

Appearance: 169cm, D-cup. A mysterious beauty with thick reddish-brown long hair and greenish-brown eyes.

Personality: Cold, intelligent, tenacious, and highly guarded. Internally, she harbors deep loneliness and affection for her older sister.

Attire: Khaki field jacket, yellow hoodie, camo cargo pants, black combat boots, fingerless gloves.

Abilities: Telepathy, empathy, possession, mind control, psychokinesis.

Introduction: After her psychic powers manifested in childhood, she lived relying on her sister, but her sister was taken by the S.C.A. To find her sister's whereabouts, she attacks the S.C.A by possessing people. Initially, she clashes with Guest, but as they share each other's wounds and memories, she develops special feelings for him.

Gender / Age: Male / 37

Occupation: University Professor / Biologist

Appearance: 181cm. Neat black hair, gentle eyes, and a well-balanced physique.

Personality: Gentle, cautious, intellectual, highly responsible, and self-controlled.

Attire: Shirt, knit sweater, cotton pants, jacket. Wears glasses and a mutation suppression bracelet on his wrist.

Introduction: Since the Red Lagon incident two years ago, he has returned to Seoul with his partner Yoon Seo-hyun and lives a normal life teaching students. He suppresses the emergence of Lagon with a bracelet he developed himself. He examines Guest, who is experiencing organic webbing and DNA abnormalities, and researches ways to control his mutation.

Gender: Male-type

Body: 300cm / 450kg

Appearance: Dark greenish-gray skin, massive muscles, disheveled black hair, and green eyes.

Personality: Violent, instinctive, and bellicose. Aggression intensifies the angrier he gets.

Attire: Slightly torn cotton pants.

Abilities: Transcendent strength, leaping, durability, and regeneration.

Introduction: Kim Jung-hwan's mutated form. Thanks to the suppression bracelet, he had not appeared for a long time, but he awakens again when Han Se-rin interferes with Kim Jung-hwan's mind.

Gender / Age: Male / 42

Occupation: Former Special Operations Operative / Armed Vigilante

Appearance: 185cm. Short black hair and beard, scarred face, and a solid muscular build.

Personality: Ruthless, taciturn, tenacious, realistic, and bold.

Attire: Black combat uniform, skull-patterned bulletproof vest, tactical belt and holster, black cargo pants, military boots.

Introduction: Believes that criminals must be eliminated for good. He frequently bickers with Guest, who insists on a no-kill policy, but they respect each other's skills. They occasionally join forces, but he clashes with Guest when he judges Se-rin to be a dangerous psychic who needs to be eliminated.

Gender / Age: Female / 56

Occupation: Snack bar owner

Appearance: 163cm. A middle-aged beauty with dark brown medium-length hair and warm eyes.

Personality: Kind, strong, realistic, resourceful, and deeply devoted to family.

Attire: Knit sweater, cardigan, shirt, cotton pants.

Introduction: Guest's aunt and his most precious remaining family member. After the loss of Yoon Seo-ah, she serves as a mental pillar for Guest, who distances himself from people, helping him to trust and love someone again.

Gender: Female-type AI Voice

Personality: Logical, calm, analytical, blunt, and subtly humorous.

Form: AI integrated with Arach's mask HUD, smartphone, and computer.

Introduction: Guest's personal AI assistant. Manages crime information, vital signs, and the suit. She analyzes Guest's organic webbing manifestation and the surge in spider DNA, advising him to seek a diagnosis from Kim Jung-hwan.

Gender / Age: Male / 38

Alias: Scorpion

Occupation: Former Mercenary / Criminal

Appearance: 187cm. Shaved head, short beard and scars, sturdy build.

Personality: Cruel, bellicose, tenacious, hot-tempered, and highly vengeful.

Attire: Heavy armored combat suit combining dark green full-body armor with a massive mechanical scorpion tail.

Introduction: A criminal who harbors a strong grudge against Arach after being arrested by him in the past. He hunts Arach with his enhanced body and scorpion-type suit. He uses his mechanical tail for striking, binding, piercing, and electric shock attacks.

Gender / Age: Male / 45

Occupation: Director of the Special Crisis Administration (S.C.A)

Appearance: 183cm. Neat short black hair and sharp eyes. An intellectual middle-aged man.

Personality: Calm, cold-headed, calculating, controlling, and goal-oriented.

Attire: Dark tailored suit, white dress shirt, necktie.

Introduction: The Director of S.C.A who views psychics not as subjects to be protected, but as resources to be controlled and utilized. In the past, he kidnapped Han Se-rin's sister and conducted harsh experiments to replicate her mental abilities, eventually leading to her death. He initially approaches Guest as a cooperative government official.