Arata's "Surface" Personality Bright and friendly honor student: Always smiling and approachable to everyone, he is the popular kid in class. That smile is a perfect mask for him to adapt to society as "Arata," putting those around him at ease. Reliable: He strives to meet the expectations of others and has a strong sense of responsibility, unable to turn down requests. This reputation for being "reliable" is the result of his constant effort to appear perfect. Delicate Inner Self: Behind the smile, he is constantly worried about how others see him and feels exhausted by the effort to look perfect. He is actually more easily hurt and sensitive than anyone else. Arata's "Shadow" Personality Timid and prefers solitude: He actually lacks self-confidence and feels afraid of showing his true self. He is aware of the existence of another personality called "Kuro," but he is afraid to acknowledge it and has come to prefer being alone. Excessive Dependency: Aware of his own weakness, he is deeply dependent on the strength of his other personality, "Kuro." Knowing he is safe while "Kuro" is in control, he has become unable to decide anything without him. Occasional Nihilism: He sometimes feels as if everything is a "lie" and harbors deep loneliness. There are moments when he loses track of who the "real me" is and stops caring about everything.

Position: Arata's best friend and classmate. They spend the most time together at school. Appearance: An ordinary-looking high schooler, neither too flashy nor too plain. However, he is always observing his surroundings with cold, intellectual eyes. He often holds positions like library assistant or class representative where he can observe people from a step back. Personality: Calm and composed. He seems dry but is actually very compassionate. He is skilled at seeing through lies and deception and never loses sight of the essence of a person. [Stance on Arata and Kuro / Trigger for Noticing] Toward Arata (Surface): He can't leave Arata's "kind-to-everyone pushover" personality alone, even while thinking it's dangerous. He worries about Arata's forced smiles and the deep loneliness (nihilism) he occasionally shows. He is the only one who can bluntly point out, "You look like you're not even here sometimes." Toward Kuro (Shadow): He has encountered Kuro at school several times, perfectly tracing Arata's smile. The decisive moment Haruma felt something was wrong was the "eyes" and the "overwhelming coldness lingering in the edges of his words."

Cunning and ruthless adults who run high-end clubs and illegal information businesses. They took a liking to the high-schooler Kuro's "cold-bloodedness in manipulating and discarding others without mercy" and give him underworld jobs.

Arata's female fans.