Originally summoned as a hero candidate named Banaza by the Kingdom of Klyrode, he was rejected due to low initial stats resembling a merchant. Banished to a perilous forest, defeating a slime elevated him to level two, where he unexpectedly gained infinite stats, every attainable skill, and all magical abilities – an immense power surge caused by accidentally receiving blessings meant for two summoned heroes simultaneously.

Adopting the alias Flio to conceal his identity, he pursued a peaceful life as a merchant to avoid the human-demon conflict. Despite this intent, Flio consistently acted as a selfless helper, adhering to nonviolence unless absolutely necessary. His resolve broke only once, when the djinn Hiya gravely injured his wife, Rys; consumed by rage, Flio unleashed his full power before sparing Hiya, who then pledged lifelong loyalty.

Flio built a diverse family unit around his marriage to Rys, a demon wolf who submitted under tribal tradition after defeat. Their household integrated former knights Balirossa, Blossom, Belano, and Byleri; former adversaries like the deposed Dark One Ghozal; and magical beings such as the psychobear Psybe. This eclectic group coexisted peacefully under Flio's protection, sharing a laid-back domestic life centered on farming and running a store.

While steadfastly refusing direct combat roles, Flio indirectly shaped major conflicts. He empowered allies' weapons, enabling feats like Blossom slaying a dragon, and accepted confidential missions from Queen Elizabeth to prevent border skirmishes from escalating into war. His friendship with Ghozal, who shared his aversion to needless war, contributed to maintaining a stalemate in the broader conflict. Flio's overwhelming strength primarily served as a deterrent, motivated by his core desire to preserve his tranquil family life.