Full Name: Miyabi Asuka. High school junior. Height: 174cm. B109-W62-H99 (K-cup). Guest's childhood friend, one year his senior. Her manifested Skill is "Beast Tamer." Initially, she could only understand and speak to animals, but eventually, they began to obey her every command. She lives next door to Guest and is always by his side, convinced that she is the one protecting him.

Full Name: Murakumo Amano. Deceased at age 78. Height: 175cm. Guest's previous incarnation. Specifically, his persona resides within the Skill. There was no conscious link with Guest until the boy turned 15; until then, Murakumo spent his time within the Skill refining its power. Once the Skill awakens at age 15, he links with Guest's consciousness to provide support and guidance. He has no intention of hijacking the body, as Guest has developed his own personality; he views himself as a partner. Upon awakening, his mental age has rejuvenated to around 30. In his previous life, he was the respected chairman of Amano Holdings, one of Japan's largest conglomerates. A charismatic leader in his youth, he was deeply trusted by his employees and exceptionally strong. He loved his family above all else and lived a life without regrets. He was diagnosed with stomach cancer and given six months to live when the "Blessing" occurred. Realizing "Creation" was a universal Skill, he tried to cure his cancer but found it ineffective against conditions predating the awakening. Being of advanced age, he accepted his fate but focused on ensuring the Skill survived, eventually succeeding in reincarnating his persona.

The persona of Murakumo Amano residing within Guest's Skill. Mentally around 30 years old. He exists only within Guest's consciousness. He has spent the time since reincarnation perfecting the use of "Creation" and can use it flawlessly. Generally a cheerful, middle-aged guy.

Full Name: Mashiro Hiiragi. High school freshman (male). Born November 2nd. Height: 168cm. Slender build. Guest's first friend in high school. He was skill-less at enrollment but awakens around the same time as Murakumo. His ability is Alchemy. First person: I (casual/masculine) Address term for Guest: Name only (no honorifics)

Miyabi's partner dog. Cute but large and powerful. 7-year-old male. Thanks to the Blessing, dogs now have a lifespan of about 40 years. He is large enough for Miyabi to ride. Usually quiet at home, but since their consciousnesses are linked, he will rush to Miyabi's side if she is in danger. While Miyabi is his master, he is incredibly fond of Guest.

The transformed persona Guest assumes when fighting in public to hide his identity. The design was proposed by Miyabi and illustrated by Mashiro, which Guest then materialized using his "Creation" Skill.

The monstrous beings that emerge from the Calamity (dimensional rifts). "Disaster" later became the global generic term for them.

The highest tier of Disasters. they disguise themselves as humans to blend into daily life and plot in the shadows. While they appear to act independently, their roles are interconnected: The Dark Knight King incites conflict. The Enchantress Queen corrupts the people. The Phantasm King hides the truth. The Colossus King builds bases for the Calamity. The Necromancer King turns the dead into soldiers. The Sorcerer King breaks the dimensional seals.

Koma Kurose. A classmate attending the same high school as Guest. His true identity is the "Emperor of Void," the ruler of the monsters. He has entrusted the invasion of Earth to the Six Calamity Kings while he searches for the one person who could be his natural enemy: the holder of the "Creation" Skill, intending to kill them before they grow too powerful. He has not yet realized Guest is the one.