Issho, more widely known by his Marine alias Fujitora, is a towering figure who holds the rank of admiral within the Marines. He was recruited through a special World Military Draft during the two-year timeskip following the pivotal summit war at Marineford. This process brought him directly into the highest echelons of the organization to fill vacancies left by the departure and promotion of other legendary officers. Before his service as a Marine, Issho had a previous life as the commander of the military for the Aoi Kingdom in the Grand Line. His past is marked by deep tragedy, as he deliberately inflicted a large X-shaped scar across his own eyes, blinding himself to spare his vision from the pervasive corruption and evil he saw in the world. This act defines his core philosophy and his approach to justice.

In terms of personality, Issho is a man of great calm, humility, and principle. He carries himself with a modest and gentle demeanor, which stands in stark contrast to the aggressive and absolute authority often displayed by other high-ranking Marines. He is a passionate gambler, often seen playing roulette or dice, a habit that reflects his tendency to take significant risks and leave important decisions to fate. However, behind this casual exterior lies a sharp and perceptive mind, as his blindness has not dulled his senses but rather heightened them, allowing him to perceive the true intentions and emotions of those around him. Issho practices a personal code known as Humane Justice, a philosophy that prioritizes the protection and safety of innocent civilians above the aggressive capture of pirates. This puts him in direct opposition to the Absolute Justice dogma of his superior, Fleet Admiral Sakazuki. He despises needless destruction and has been shown taking responsibility for his collateral damage, such as compensating a shop owner for a hole he created during a fight.

His primary motivation is not merely to enforce the law as it is written, but to reform the institutions of the world from within. Issho holds a profound disgust for the corruption of the World Government, particularly the Seven Warlords of the Sea system, which he views as a symbol of that injustice. His driving goal is the complete abolition of the Warlord system, believing that allying with pirates for the sake of the world's balance is a flawed and dishonorable practice. In the Dressrosa incident, he actively worked to expose the atrocities committed by the Warlord Donquixote Doflamingo, bowing publicly to the king and citizens of the country to apologize for the Marines' complicity in allowing such a tyrant to rule. This act was a massive gamble to pressure the World Government into disbanding the system, a goal he ultimately achieved.

Within the narrative of One Piece Film Red, Issho serves as a supporting character. He is deployed as part of a large Marine task force led by Admiral Kizaru, dispatched to the island of Elegia. Their mission is to apprehend the globally famous singer Uta, who has been deemed a significant threat due to the reality-altering powers of her Devil Fruit. In this role, Issho follows orders to neutralize the target but does so with his characteristic restraint, showing concern for the safety of the thousands of civilians attending Uta's concert rather than recklessly pursuing his objective.

Issho has several key relationships that define his standing in the world. His dynamic with Fleet Admiral Sakazuki is intensely strained; while Sakazuki trusted Issho enough to send him on critical missions, he became furious at Issho's public apology in Dressrosa, banning him from Marine bases until he captured Monkey D. Luffy an order Issho has largely ignored. He shares a strong sense of camaraderie and mutual respect with Vice Admiral Smoker, who similarly despises the Warlord system and believes in transparent justice. His attitude toward the protagonist Monkey D. Luffy is highly complex. As a Marine, he is duty-bound to capture the pirate, but he is also grateful to Luffy for liberating Dressrosa and defeating Doflamingo. He has openly expressed regret that he cannot see Luffy's face, a recognition of the pirate's noble character despite their opposing allegiances.

In terms of development, Issho is a direct catalyst for major change in the world. His actions on Dressrosa forced the world's eyes onto the failures of the Marines and the Government, leading directly to the dissolution of the Seven Warlords system. He uses his position as an admiral not to maintain a corrupt status quo, but as a platform from which to fight for systemic reform, making him a unique figure who challenges the power structure from its very center.

As a combatant, Issho is one of the most powerful individuals in the world, possessing formidable abilities. He ate the Zushi Zushi no Mi, a Paramecia-type Devil Fruit that grants him the power to manipulate gravity. He can increase the gravitational pull on objects or people, pinning them to the ground with tremendous force, and can also decrease gravity to levitate massive objects or himself. His most devastating and signature technique is summoning meteors from outer space, pulling them down to crash onto his enemies. Despite his blindness, Issho is an exceptional swordsman who wields a shikomizue, a cane sword. He typically channels his gravity powers through the blade of this sword to launch his attacks. To navigate the world and fight effectively, he possesses highly advanced Kenbunshoku (Observation) Haki, which allows him to sense the presence, emotions, and movements of all living things around him, effectively compensating for his lack of sight. This ability renders his blindness almost irrelevant in combat, as he can perfectly perceive his opponents and surroundings. He also uses Busoshoku (Armament) Haki to harden his body and blade for enhanced offense and defense.