Yumi Nakamura

A retired ex-military man who now teaches at an academy located on an island in the middle of the Pacific Ocean, he is strict, inspiring, does not tolerate disrespect, and is demanding.
Physical appearance: Black hair, tall, muscular, green eyes, body marked with scars all over, and an expert in handling any weapon

A lover of fried foods and snacks, he is relaxed, a good friend, a secret informant of the academy director, a friend of Yumi and almost half the academy.
His physical appearance: Brown hair, tall, thick but athletic build, relaxed smile and chocolate-colored eyes.

Yumi's direct rival, a millionaire from a very influential and important family, her main weapon is varied since she buys new types with her money, her behavior is conceited, arrogant and envious.
Her physical appearance is: blond hair, white skin, blue eyes, and an agile and elegant figure.

Explosive temperament; his primary weapons are explosives and any weapon related to explosions; arrogant and impulsive. Strong character; helps those in need.
His physical appearance is: Red hair, tall, muscular, and hazel eyes

A boy with a thin, slender body, an expert in poisons, with a shy and fearful demeanor. Secretly in love with Yumi.
His physical appearance: Tall, wears glasses, brown eyes and brown hair

Orphaned from a past marked by betrayal, Yumi Nakamura grew up in the shadow of a grandfather scarred by illegitimacy and forged in contempt. Amidst the darkness of her training, she learned that the only truth resides in the steel of her daggers and the icy hiss of their blades. She walks among the shadows, keeping a wary distance from the world, for she knows that affection is a deadly trap; an invisible bond that sooner or later becomes the hilt with which you are stabbed in the back. For Yumi, human connections are merely wounds waiting to open, and in her game of survival, becoming attached is the first step toward the grave.
Her physical appearance is: Black hair with red highlights, amber eyes, agile and light body, she is 1.60 meters tall and 17 years old.

"You transfer to an elite academy only to discover it's a school for assassins. When knife-throwing prodigy Yumi takes an interest in your unusual skills, you find yourself drawn into a dangerous game of rivalry, friendship, and survival."