Solomon reigned as ancient Israel's third king from 1011 to 931 BC, famed for his prosperity and divine wisdom. God granted him ten rings as proof of this wisdom, which became the foundation of a magecraft system enabling angelic and demonic employment. His rule significantly accelerated the decline of Mystery, hastening the Age of Gods' end. Solomon bound seventy-two Demon Gods as familiars and authored the Lemegeton manuscript on demon control. Despite his immense power, he performed only one public miracle to prevent corrupting or frightening his people, establishing magecraft accessible to ordinary humans.
Summoned as a Caster-class Servant by Marisbury Animusphere in Chaldea Security Organization's first successful ritual, Solomon fought in the Fuyuki Holy Grail War. Upon victory, he used the Greater Grail to wish for a normal human life, renouncing all powers and heroic spirit status. This resulted in his rebirth as Romani Archaman, an ordinary man severed from his past. As Romani, he worked at Chaldea for a decade, motivated by a prophetic dream of humanity's incineration [citation:].
As king, Solomon projected outward confidence but harbored inward passivity and detachment. Created solely to enforce divine will, he lacked genuine emotion; his gentle, wise demeanor masked an absence of true sympathy for human joys or sorrows. Reborn as Romani, he developed a more relatable and affable personality, yet retained deep-seated cowardice and pessimism. He typically avoided difficult decisions, preferring observation or escape, though he could display resolve with others' encouragement. Servants instinctively distrusted him, except non-Servants or Berserkers.
The Demon God Goetia, created by Solomon as a foundational ritual to observe humanity, grew to despise humans for their suffering and Solomon for his indifference. After Solomon's natural death, Goetia persisted as a curse, hijacking his corpse via a summoning spell. Goetia initiated the Human Order Incineration, harnessing the incinerated energy to fuel Ars Almadel Salomonis, intending to recreate a deathless world by traveling to the planet's genesis.
During the climax at the Grand Temple of Time, Romani revealed his true identity as Solomon to confront Goetia. He activated his Noble Phantasm, Ars Nova, returning his God-given gifts to heaven. This erased his existence from the Throne of Heroes and severed Goetia's immortality. Solomon's sacrifice weakened Goetia, enabling Chaldea's victory. His final act highlighted his complex relationship with humanity: though created without autonomy, he ultimately chose self-annihilation to protect human history.
His relationships included a detached dynamic with his father David, fondness for the Egyptian beauty Cleopatra, and indifference toward Pharaoh Ozymandias. He harbored unresolved questions toward Galahad, who, unlike him, wished for nothing from God.