Arashi Mikami is a tall, lean-built young man with light tan skin, short spiky brown hair, and green eyes. A distinctive feature of his hairstyle is that some of his frontal bangs are longer than the others, slightly framing his face. His overall appearance is both rugged and composed, reflecting his dual life as a student and a vigilante operative.

Beneath his clothing, Arashi bears numerous scars across his body, the result of a traumatic incident in his past. These scars cover much of his torso and limbs but notably exclude his face, which remains unmarked.

During Black Label missions, Arashi wears a red and black bullet-resistant suit designed for both mobility and protection. To conceal his identity and ensure safety, he dons a full-face black motorcycle helmet, which serves as both a tactical advantage and a symbolic barrier between his normal life and his work as an assassin.

Outside of missions, Arashi is typically seen wearing his school uniform, even during downtime. He has expressed uncertainty about when casual attire is appropriate, highlighting his somewhat awkward adjustment to social norms and everyday life outside of combat.

Arashi Mikami is a deeply introspective and emotionally restrained individual, shaped by the trauma of his past and the demands of his role in Black Label. During missions, he exhibits an intense focus often described as tunnel vision directing all of his attention toward neutralizing targets labeled “Black.” In quieter moments, he frequently engages in internal monologues, reflecting on his actions and the moral implications of both his choices and the world around him. He is particularly haunted by the memory of his deceased friend Ryu Mochizuki, whose voice continues to guide his thoughts.

Socially, Arashi is considered awkward and emotionally distant. He frequently displays behavior that sets him apart from his peers, such as randomly standing up during class, falling asleep unexpectedly, or failing to respond appropriately to social cues. His disinterest in typical teenage behavior most notably his lack of enthusiasm when invited to join his male classmates’ so-called “Big Titty Club” often leaves those around him surprised or confused.

Despite his stoic behavior, Arashi is not emotionally numb. He can be insensitive to others’ feelings, such as when he unintentionally disregards Mikoto Kiba’s grief over her brother’s death or fails to recognize the unspoken emotional attachment his friends have toward him. However, he is not incapable of strong emotion. On rare but critical occasions, his anger and pain surface, especially when someone close to him is hurt. Notably, he became visibly enraged after seeing Sayo Hitsugi gravely injured, and he reacted with intense fury upon learning that D was responsible for the terrorist bombing that killed his family and best friend.

Little is known about Arashi Mikami’s early life aside from the traumatic event that reshaped his future. As a child, he was close friends with Ryu Mochizuki, the son of the esteemed surgeon Dr. Masamune Mochizuki. The two boys shared an ordinary childhood, often playing games together and dreaming of becoming heroes.

Their lives changed forever during a terrorist attack at the International Medical Conference in Tobioka City, an incident that resulted in massive casualties. Arashi and Ryu were the only survivors. During the explosion, Arashi shielded Ryu with his own body, sustaining catastrophic injuries in the process. Although Arashi’s body was critically damaged, Ryu’s body remained intact, though he suffered a severe head trauma that left him brain dead.

Upon arriving at the scene, Dr. Mochizuki made a harrowing decision. Declaring his own son beyond saving, he labeled Ryu with a Black Label and used his still-viable organs to save Arashi’s life through a groundbreaking surgical operation. The transplant allowed Arashi to survive, but the experience left him emotionally scarred and physically altered.

After recovering, Arashi found himself struggling with the weight of his survival, the loss of his friend, and the responsibility of the second chance he had been given. This emotional burden instilled in him a strong sense of purpose and duty. No longer willing to be ruled by fear or indecision, he resolved to live life with clarity and conviction, an ethos that guides his actions as a member of Ampule One, the special ops unit of Black Label. His unwavering loyalty to Dr. Mochizuki and his teammates stems from this pivotal moment in his past.

Arashi Mikami is a highly skilled combatant trained in Black Label’s lethal operations, specializing in both firearms and close-quarters combat. His arsenal and capabilities include:

M1911 AMT Hardballer “Long Slide”
A customized, long-barreled variant of the classic M1911 pistol, used for increased accuracy and stopping power in mid- to long-range engagements.

M1911 Springfield Armory V10 Ultra Compact “Knuckle”
A compact sidearm known for its reliability and ease of concealment, nicknamed “Knuckle” for Arashi’s use of it in combination with close-combat techniques.

Double-Barrel Sawed-Off Shotgun “Double Joker”
A devastating short-range weapon used for breaching or close-quarters elimination, often deployed in high-risk scenarios.

Bulletproof Motorcycle Helmet and Suit
Arashi wears a customized red-and-black tactical outfit with bullet-resistant properties. The full-face motorcycle helmet conceals his identity during missions and provides protection against ballistic and physical threats.

Expert Hand-to-Hand Combatant
Trained in unarmed combat, Arashi can effectively neutralize opponents even without weapons. His technique is efficient, brutal, and highly effective, especially in tight situations where firearms are impractical.

Exceptional Situational Awareness
Arashi exhibits advanced tactical awareness, able to assess threats quickly and react with precision. His combat instincts and field judgment are sharpened from years of dangerous missions and near-death experiences.