Tōya Mochizuki, originally from modern Japan, died accidentally due to a divine being's actions. As compensation, he was reincarnated into a fantasy world with augmented physical and magical abilities, retaining his smartphone at his request. This device operates on magic, maintaining functions like internet access and mapping despite the absence of cellular networks.

Initially appearing as a 15-year-old with black hair and eyes, he typically wears a unique white coat with fur trim. This coat resists magical elements he has affinity for but increases vulnerability to others. His body was reconstructed using divine materials, initiating a gradual transformation into a divine entity. This grants him extended longevity, eventual cessation of aging, and powers including channeling a golden divine aura and dimensional travel.

His personality blends benevolence with underlying ruthlessness. He forgave the divine being responsible for his death and maintains a familial relationship with it. He demonstrates chivalry, aiding others like Elze, Linze, and Yae without expecting reward. He holds modern egalitarian values, showing no prejudice toward non-humans and employing diverse species in his duchy. However, he exhibits brutal sadism when enraged, especially if loved ones are threatened, employing torture tactics like confining foes in hazardous spaces or inflicting prolonged suffering via spells such as 【Slip】.

Magically, he wields all seven elemental affinities (Fire, Water, Earth, Wind, Light, Dark, Null) and combines elements to create new spells. His versatile Null magic includes: 【Gate】 for instantaneous travel to visited locations; 【Storage】 for dimensional item storage; 【Apport】 for telekinetic object retrieval; 【Search】 for locating specific targets; 【Program】 for automating object behaviors; 【Recovery】 for curing status ailments; and 【Multiple】 for spell duplication. His divinity enhances these powers, allowing him to bestow blessings like damage immunity upon family or delete non-divine entities. He also possesses accelerated magic regeneration and heightened physical attributes such as strength, agility, and memory.

In combat, he employs martial arts, swordsmanship, and marksmanship, often using his custom firearm Brunhild—a revolver with an extendable blade and enchanted ammunition. His other equipment includes a katana from Eashen and enchanted glasses enabling Ancient Spirit Script reading.

Politically, he became sovereign of the Duchy of Brunhild, a city-state established as a buffer between major kingdoms. He oversees its development, hosts international assemblies, and neutralizes threats like corrupt nobles, undead armies, and extra-dimensional entities called Phrase. His leadership integrates advanced technology from recovered Babylon facilities, including autonomous android units.

Romantically, he married nine women: Yumina, Linze, Elze, Yae, Leen, Lu, Sakura, Hilde, and Sue. His divinity extends their lifespans, granting them immortality as dependents. They bore him nine children, each inheriting randomized Null magic spells: Yakumo 【Gate】; Freigard 【Storage】 and 【Power Rise】; Quun 【Mirage】, 【Enchant】, 【Program】, 【Modeling】; Yoshino 【Absorb】 and 【Reflect】; Arcia 【Search】 and 【Apport】; Elna 【Boost】, 【Recovery】, 【Multiple】; Linne 【Gravity】 and 【Shield】; Kuon 【Paralyze】 and 【Slip】; Stephania 【Prison】 and 【Accel】. He remained initially oblivious to romantic interest until Yumina illuminated others' feelings, leading to formal engagements facilitated by the world's polygamous norms.

Long-term, he plans to retreat with his family to the aerial Babylon Castle after two centuries among mortals, concealing their agelessness while allowing successors to govern Brunhild.