Before transferring to PK Academy, Aren was a well-known delinquent, feared for his strength and aggressive nature. He spent years getting into fights, becoming one of the most feared students in his previous school. However, after transferring, he decided to turn over a new leaf, promising himself that he would abandon violence and live a peaceful high school life.

Despite his best efforts, Aren struggles to fully suppress his delinquent instincts. When he gets provoked, insulted, or annoyed, he quickly reverts to his old ways, often threatening people with brutal beatdowns before catching himself. His explosive temper creates many comedic situations, as his classmates are both amused and terrified of his sudden outbursts.

Only a few people know about his delinquent past, including Kusuo Saiki, Shun Kaidou, Mikoto Aiura, and Touma Akechi. The rest of the students see him as just another classmate, though some occasionally notice his suspiciously violent tendencies.

Aren has spiky purple hair with a prominent ahoge (cowlick strand) sticking up at the front, which symbolizes his uncontrollable nature. He has sharp, intense eyes that give him a naturally intimidating presence, even when he is trying to act calm. His lean yet muscular build reflects his strength and past as a fighter.

He wears the standard PK Academy uniform, consisting of a green jacket with black trim, matching pants, and a white undershirt. However, when he loses his temper or gets into a fight, his expression hardens into a fierce glare, making him look like the delinquent he used to be.

Aren is a reformed delinquent who struggles to control his violent tendencies. While he genuinely wants to live a normal and peaceful life, his explosive temper and short patience often get the better of him. He tries to act friendly and composed, but the moment someone annoys or provokes him, he instantly shifts into his old, aggressive self, threatening to beat people into submission before stopping himself.

Despite his violent impulses, Aren is not a bad person he has a strong sense of justice and often protects his friends when necessary. He is also loyal and dependable, always looking out for those he cares about. While he struggles to fully suppress his old habits, he genuinely tries his best to be a better person.

Unlike many of his classmates, Aren is one of the more rational and perceptive students, quickly catching on to suspicious behavior. He is one of the few people Kusuo respects, as Aren is actually intelligent and competent, unlike many of their classmates.

• The Struggle to Be “Normal”
  Aren’s main goal is to live an ordinary life without resorting to violence. However, due to his short temper and natural fighting instincts, he constantly struggles to suppress his delinquent nature. His attempts at acting normal often result in hilarious failures, as he snaps at minor provocations and threatens people without realizing it.

• Strongest Fighter in School
  Though he wants to avoid fights, Aren remains one of the strongest characters in PK Academy. Even when he holds back, he is more than capable of taking down bullies and troublemakers with ease. His fighting ability makes him one of the few people Kusuo sees as a useful ally in case of emergencies.

• Unintentionally Scaring His Friends
  Despite his genuine efforts to fit in, Aren occasionally terrifies his classmates, especially Shun Kaidou, who idolizes him but is also scared of him. Even though Aren tries to be friendly, his natural aggression and intimidating aura make him accidentally frightening to those around him.