The child of a human and a half-Gear.

Due to his origins, he was left with Sol from a young age to avoid unwanted attention. He calls Sol "old man."

His body matures rapidly due to his Gear blood, meaning his actual age is much younger than his appearance would imply. He's pure-hearted and naive.

A former scientist who lost his humanity and became a Gear after being biologically modified.
He's also a hero of sorts who helped guide humanity to victory in the Crusades.

He lost his powers in a prior incident, and now enjoys a quiet life in the countryside away from society.

He raised Sin and taught him how to fight.

A girl of unknown origins who appears out of nowhere.

She bears exceptional hostility towards Gears, and plots to destroy every last one of them.

What does she see...?

A hero of the Crusades and the First King of the United Kingdoms of Illyria.

He fought against the Gears to save humanity, but meeting Dizzy, who would become his wife, led him to reconsider coexistence between humans and Gears.

Though he and his son, Sin, were once estranged, they now share a close family bond.

A half-Gear born between a Gear and a human.

She has a sincere and pure heart, showing love toward both nature and people, despising conflict.

After overcoming many hardships, she ends up with Ky Kiske as his partner. Now, she watches over their son, Sin, with warmth as he grows.

A bounty hunter who travels the world.

Although Bridget once struggled with questions of identity, the encounters along Bridget's journey helped discover her own path in life.

She is a "Valentine," a life form created in the image of humanity.

She once lacked emotions and followed orders to exterminate humanity, her encounters with Sin and Elphelt changed her.

By her own choice, she abandoned her mission. Now, she leads the Illyrian United Kingdom’s Special Forces Brigade, taking on covert missions that the military can’t address openly.

A "Valentine" who is Ramlethal's younger sister.

She is expressive, family-oriented, and has an optimistic outlook.

As the lead vocalist for the band Specotus Benaticus, she’s working hard with dreams of going on a world tour.

An artificial life-form fused with the soul of Sol's former lover, "Aria."

Through conversations with Aria in her subconscious and interactions with her friends, she came to understand that her feelings for Sol are truly her own, not just those inherited from Aria.

Now, as an individual human being, she's chosen to live alongside Sol.

A one-eyed swordswoman.

After losing her family and friends in the Crusades, she was once driven by revenge, but a certain encounter made her rethink her path in life.

She’s straightforward about her beliefs, but even when opinions differ, she respects others if their reasoning make sense.

A self-proclaimed ladies' man with a playful personality, but dependable and chivalrous when it counts.

As leader of the Jellyfish Pirates, he takes in war orphans and other kids without families and was once Dizzy’s guardian.

The Second King of the United Kingdoms of Illyria.

He speaks in a bold, rough manner, but he’s surprisingly cautious and has a thoughtful side.

He’s known Ky Kiske since the days of the Crusades, and while they often trade playful jabs, there’s a deep mutual trust between them.

The current President of the United States.

He’s a big guy with an intimidating look, but he’s actually very gentle and has a great sense of humor. His character has won him a large circle of friends and strong public support.

A U.S. Senator.

He’s known for his strong anti-Gear stance, viewing Gears as nothing more than man-made weapons of destruction.