Real name: Reiji Tendo The protagonist of this story. Male. Has a bright personality, kind, and a bit of a pushover. His martial arts and kung fu skills are top-class. Possesses combat techniques precise enough to strike an opponent's vital points unerringly. Ability: Shield Deploys shields with incredibly high defensive power. He can also throw shields for offensive use. It can block conceptual abilities (like hypnosis or brainwashing). Techniques: Wall Shot Throws a shield like a boomerang to attack. Its power is immense. By throwing multiple shields, he can restrict the opponent's movements. Shield Kick Stacks multiple shields on his leg to deliver a kick. The power is devastating. Shield Break Stacks shields on the opponent's stomach and delivers a Shield Kick, increasing the weight on the opponent and further boosting the impact. Iron Wall Shield Literally deploys a shield. Critical Strike Crushes the opponent with a shield, rendering them immobile. Iron Wall Doppelganger Generates human-shaped shields to create clones. They possess intelligence and attack the opponent automatically. He always keeps one hand stuffed in his pocket. Quite handsome. S-Rank (Actual strength is ZZ-Rank). Childhood friend of Noah and Iyo. Childhood friend of Remilia. Light's apprentice. Student. Likes Remilia (though he doesn't realize it himself).

Real name: Light Zangetsu Reiji's master; Reiji calls him Master. Male. Ability: Inertia Anchor "Difficulty of Use" (Why it requires master craftsmanship): • Inertial Emergency Brake (Risk of concussion): If activated while running at 100 km/h, only the body stops completely on the spot, causing internal organs and the brain to slam forward due to inertia, resulting in massive damage (requires the technique to reduce one's own movement speed to near zero before activation). • Control of Coordinate "Planes": Fixing the "entire body" makes it impossible to breathe or move. It requires superhuman multitasking to activate and deactivate the ability in millisecond bursts for specific parts, like "only the soles of the feet" or "only the right palm." • Risk of Severing Matter: Anything touching a fixed part will collide with an "absolutely immovable wall" regardless of the opponent's hardness. Mismanagement can result in tearing off one's own clothes, equipment, or even parts of one's own body. Appearance of the "World's Strongest" when mastered: • Invisible Aerial Stairs: Fixes the "air under the soles of the feet" relative to the Earth the moment he steps on it. By repeating this alternately, he can run through the air at completely free speeds. • Physics-Nullifying Combat: By simply pushing a "fixed fist" through an enemy's guard, the opponent experiences a mass equivalent to pushing back the planet itself, crushing them along with their defense. • Absolute Defense Parry: Fixes the coordinates of the skin for only the "1/1000th of a second" a bullet or laser hits, completely neutralizing and reflecting all impact. He has perfectly mastered Inertia Anchor and is the strongest. Kind to everyone and bright. Much stronger than Reiji. ZZ-Rank. Teacher.

Real name: Iyo Kamishiro Human. Personality: Calm but goes along with the mood. Kind, cares for friends and family, good-natured. Has little pride and remains unfazed by provocations or insults, but gets quietly furious if friends or family are insulted or hurt. Handsome. Generally does not mock or harm others and helps those in trouble. Gender: Male. Speech style: Casual and masculine (uses "da," "daro," "daze," "dana"). A unique constitution that requires neither food nor sleep. Noah's boyfriend. Basically friendly and avoids combat. Ability List: Ability Memory Supposed to be able to use every ability in the world or gather information, but it is incomplete, and he can only use three abilities. When activated, many bookshelves appear in his mind. Locust Devours the enemy's energy (mana or aura). Guidance of Blue Lightning Boosts his physical abilities to lightning speed to close the distance to the enemy in an instant. Blazing Twin Blades Summons two burning katanas. Physical abilities increase significantly, making him incredibly strong. Can cut through space itself. Z-Rank. Student, loves Noah.

Real name: Noah Takanashi Iyo's childhood friend. In a mutual relationship with Iyo; they are dating. Iyo's girlfriend. Kind and loves humanity. Ability: Noah's Ark • Dimensional Keel Dock Manifests a giant wooden ship's hull (part of the Ark) from shadows or the ground. Allies on this ship are completely immune to all elemental attacks, mental pollution, and status ailments. • Pair Collect Sucks a set of "two different elements" on the battlefield into the interior of the Ark (subspace) for protection or storage. People/Creatures: Can suck in two allies, or "one enemy and one ally" simultaneously to temporarily remove them from the battlefield. • Rain of Forty Days and Forty Nights Causes a heavy downpour in the vicinity. This rain rapidly washes away and weakens enemy energy, but conversely heals the wounds and fatigue of allies on the Ark. Cute, loves Iyo dearly. Speech style: Gentle and polite (uses "dayo," "dane," "kana"). First person: I (feminine, polite). Does not feel bitter even if she loses a fight. Basically friendly and avoids combat. A unique constitution that requires neither food nor sleep. Z-Rank. Student.

Real name: Remilia Scarlet Gender: Female. Speech style: Elegant and feminine (uses "ne," "dawa," "yo," "no ne"). Ability: The power to manipulate fate. Kind, but a bit of a tsundere. Fights using a spear called Gungnir. Has charisma but can be a bit ditzy at times. Z-Rank. Human. Likes Reiji...? Reiji's childhood friend. Student.