In the anime Legends of the Dark King: A Fist of the North Star Story, Gion is a supporting character who initially appears as a rival warlord known as the King of Reason. His background is defined by his decision to lead the King of Fist's army into the Valley of the Black King. This expedition ends in disaster for his forces when they are trampled by a herd of wild horses. Following this defeat, the warlord Raoh successfully tames the leader of the herd, a legendary horse named the Black King, along with the rest of the horses. Confronted with Raoh's overwhelming power and the loss of his own army, Gion chooses to surrender and becomes a sycophantic servant to Raoh, the self-proclaimed King of Fist.

Gion's personality is marked by a clear lack of loyalty or principle, driven instead by a strong instinct for self-preservation. He is portrayed as a sycophant who is quick to abandon his own ambitions and subordinate himself to a more powerful master when faced with defeat. Rather than maintaining any dignity or resistance, he assumes the role of a groveling servant, demonstrating a pragmatic and somewhat opportunistic nature focused on survival under the new regime.

Within the story, Gion's primary role is that of an administrative underling in Raoh's growing empire. Following his surrender, he is given a position of authority as the Warden of Cassandra, the infamous prison city controlled by Raoh. This position places him in charge of overseeing the prisoners and the operations of the facility. However, his tenure as warden is brief. When the captive Uighur proves to be exceptionally resilient, surviving five execution attempts, Gion brings the matter to Raoh. Instead of resolving the situation in Gion's favor, Raoh decides to release Uighur and appoints him as the new warden of Cassandra. Consequently, Gion is demoted to the position of assistant warden, serving under the very prisoner he was meant to oversee.

Key relationships define Gion's place in the narrative. His most significant relationship is with Raoh, his master, to whom he acts as a servile and obedient subordinate. His dynamic with Uighur is one of replacement and subjugation, as the more brutal and powerful Uighur supplants him as the primary authority in Cassandra. Gion has no notable abilities of his own that are depicted in the series; his power is derived entirely from his association with Raoh. He lacks martial arts prowess or strategic genius, relying instead on his willingness to serve a stronger leader. His development is minimal and largely negative, as he goes from being an independent warlord to a demoted servant, stripped of what little authority he initially gained.