TV-Series
Description
Maru is a fifteen-year-old boy who serves as one of the two main protagonists in the story. He is an orphan raised by a woman named Mikura, who on her deathbed entrusts him with a mission: travel across post-apocalyptic Japan to find a place called Heaven and deliver a cure to a person who shares his exact face. To accomplish this, he is accompanied by a bodyguard named Kiruko, whom he affectionately calls sis. Maru is a teenager of short stature, with a youthful and androgynous build, pale skin, messy black hair, and heterochromatic eyes one blue and one yellow. His appearance is noted to be strikingly similar to that of a girl named Tokio who lived in a secluded nursery facility years earlier, a connection that lies at the heart of the story's mysteries.

In daily conversation, Maru is straightforward, impulsive, and sometimes clumsy with words. This bluntness contrasts with his handsome looks, creating a gap that other characters often remark upon. Beneath his rough edges, he is fundamentally kind and loyal, and he possesses a sharp intellect that he uses to navigate the dangers of the ruined world. He is also portrayed as resilient yet vulnerable, often grappling with insecurity about his own identity and origins. At the start of his journey, he is described as a very pure character but ignorant of the world, gradually gaining a stronger sense of self as he learns more about the past.

Maru's primary motivation is to find Heaven and the person who looks like him. This goal is not merely physical but also deeply personal: he seeks answers about his own origin, including the possibility that he may be a clone of Tokio's real child. He is driven by a need for belonging and self-discovery. As the journey progresses, his priorities shift, and he develops strong feelings for Kiruko, confessing his love even after learning that Kiruko is actually a boy whose brain was transplanted into his sister's body. This revelation does not diminish his bond with her, and the two continue to travel together, their relationship evolving into a mutually supportive partnership.

Maru plays a central role in the narrative as the link between two timelines: the post-apocalyptic present in which he travels and the past events at the Takahara Academy, where children were experimented on. He is revealed to be the son of Tokio and Kona, either their biological child or a clone. His twin or clone, Yamato, is the person he is searching for. Maru's interactions with other survivors, such as the man named Juichi who provides them with a van, further develop his character and push him toward understanding the truth about Heaven and the man-eaters.

Key relationships shape Maru's growth. His bond with Kiruko is the most significant, blending sibling-like affection with romantic tension. He relies on her protection but also proves to be a capable fighter in his own right. His caretaker Mikura, though deceased, set him on his path. His parents, Tokio and Kona, are the source of his mysterious origins, and his twin Yamato represents the missing piece of his identity. Through these connections, Maru learns to value relationships beyond blood ties.

Maru possesses notable abilities. He is a skilled hand-to-hand combatant, able to easily overpower adult opponents. More distinctively, he has a supernatural talent to destroy the giant creatures known as man-eaters or Hirukos. By making physical contact with the core of these beings, he can instantly exterminate them, a technique that Kiruko names Maru Touch. This ability, along with his enhanced agility, is tied to his origins as a Hiruko a being created through genetic experimentation. His powers evolve as he matures, reflecting his growth from a naive boy into someone who begins to understand the weight of his own existence.

Over the course of the story, Maru undergoes significant development. He starts as a cheerful, somewhat oblivious teenager focused on a simple mission, but as he encounters tragedy, betrayal, and revelations about his past, he becomes more introspective and determined. His journey is as much an internal search for identity as it is a physical one, highlighting his resilience and determination to carve out his own place in a broken world. His combination of lethal ability, emotional honesty, and social awkwardness makes him a compelling and unpredictable protagonist.