Hiraku Machio is the central figure of the narrative, a man who was originally from modern-day Japan. In his previous life, he was an office worker who faced severe hardships, including the loss of his parents at a young age and a long struggle with poor health. After years of being hospitalized due to the side effects of overwork at a demanding company, he passed away at the age of thirty-nine. Upon his death, his soul encountered a god who wished to send him to another world. The god apologized for unspecified troubles and offered to grant Hiraku a wish. Because of his extended time in the hospital, Hiraku's desires had become simple; he asked for a healthy body immune to illness and a quiet, peaceful place where he could live as a farmer, inspired by farming programs he had watched on television. His wish was granted, and he was reincarnated in his prime, appearing roughly twenty years old again, and was given a mysterious tool known as the All-Purpose Farming Tool.

Personality-wise, Hiraku is characterized by a strong pacifist nature and a deep-seated aversion to conflict. He consistently seeks to build friendly relationships with outside forces to maintain the peace of his community. He is a kind and compassionate individual who cannot ignore those who are suffering, which leads him to welcome a diverse array of people into his home, from vampires and angels to homeless high elves. Despite being thrust into the role of a leader, his genuine interest remains in agriculture and manual labor rather than administration or politics. He dislikes being the center of attention, yet his actions and the requests of his growing number of residents constantly place him in the spotlight. His perspective on what is normal is notably distorted, a remnant of his long illness and sheltered life on Earth. He often forgets his own superhuman endurance and has been known to hold incorrect assumptions about the world's races, such as believing vampires manipulate blood or that elves dislike metal, which are later corrected by those around him. Furthermore, he is remarkably fearless, showing no terror when facing dangerous monsters or dragons that would terrify anyone else. He can also be merciless when his village or his crops are directly threatened, as seen when he immediately retaliated against a wyvern that attacked his farm.

Hiraku's primary motivation is to live a serene life as a farmer, free from the stress and turmoil of his previous existence. This wish was the foundation of his reincarnation. However, as his simple farm attracts more and more inhabitants seeking refuge from a harsh and war-torn world, his role evolves beyond his original intent. He finds himself becoming the de facto leader of a rapidly growing village, taking on responsibilities for management, diplomacy, and the welfare of numerous different races. While he accepts these duties, his personal drive remains tied to cultivating his land and enjoying the fruits of his labor with his expanded family.

His role in the story is that of the unintentional founder and leader of Big Tree Village. Starting alone in the middle of a dangerous region known as the Forest of Death, he begins by clearing land around a massive central tree. His settlement gradually becomes a haven for a wide variety of races, including vampires, high elves, angels, beastmen, dwarves, dragons, and demons. The residents, who are often refugees or from dying races, look to him for protection and prosperity, eventually bestowing upon him the title of Village Chief. While he resists more grandiose titles such as king or emperor, his authority is absolute, and his decisions shape the village's development from constructing basic infrastructure like wells and bathhouses to managing international trade and hosting martial arts tournaments.

Hiraku develops several key relationships throughout his new life. His first companions are a pair of large black wolves he names Kuro and Yuki, who are actually a powerful species known as Inferno Wolves. They become his loyal protectors and the founders of a large pack that aids the village. His first humanoid companions are Ru Rurushi, a vampire princess, and Tia, an angel known as the Angel of Annihilation. He gives his blood to revive Ru, and Tia initially comes in pursuit of Ru, but both end up staying and become his first two wives. While Hiraku initially wished to be with only Ru and Tia, he is eventually pressured by other groups seeking to preserve their species, leading him to have many more wives and children from races such as the high elves, oni, angels, and dragons. He is a doting father who loves his many children, though he has occasionally worried about being unloved by them, a fear that is unfounded.

In terms of character development, Hiraku grows from a solitary farmer into the respected, if often overwhelmed, chief of a massive, multi-species village. He gradually learns to navigate the complex politics of his new world, often leveraging his overwhelming but unintentional power to secure advantageous relationships with external powers like the Demon Kingdom. He struggles to reconcile his modern, pacifist, and egalitarian values with the harsh, feudal, and often brutal realities of the other world. His insistence on monogamy and his reluctance to establish a clear line of succession for his position, for example, cause confusion and stress for his family and subjects who view such structures as necessary for stability. Over time, he adapts by accepting his role and implementing systems like an inter-village representative council, though he still largely sees the world through a filter of his own "normal" common sense, which often blinds him to how extraordinary his village and his own feats truly are.

Hiraku possesses several notable abilities, though his personal power is highly reliant on the gifts he received from the god. He cannot use any magic at all, which is a basic skill that even slimes possess in this world. His primary asset is his Healthy Body, a divine blessing that grants him immunity to all diseases and provides him with nearly limitless stamina and mental fortitude, allowing him to work for extended periods without rest. His most significant tool is the All-Purpose Farming Tool. This item normally resides within his body and can be summoned at will, transforming into any non-powered tool he can imagine. As a hoe, it can instantly turn any land into a fertile field and cause crops to sprout and grow at three to four times their normal rate. As an axe, it can fell trees as hard as iron and prepare them for immediate use as lumber. It can also transform into other tools such as a shovel, wheelbarrow, watering can, knife, and hammer, each with similarly supernatural levels of efficiency. The tool's true nature is that of a replica of a divine holy lance, which allows it to take the form of a javelin or spear. In this form, it possesses the power to pierce through magical barriers and kill powerful creatures such as wyverns and dragons in a single blow. However, using it in this way would normally drain a user's energy completely, but Hiraku's Healthy Body instantly replenishes his stamina, allowing him to wield this divine weapon without consequence.