Kazuki Kazami

Name: Kazuki Kazami

Gender: Female

Birthday: March 22

Blood type: B

Height: 150 cm

Measurements: 76 (A cup) / 57 / 78

Voice actors: Yukari Aoyama in the PC game, Akane Tomonaga in the anime

Kazuki is Yūji Kazami’s sister, two years older than him.

She is small and slender, but possesses extraordinary intelligence supported by a high-speed memorization method called compressed memorization and exceptional observational ability.

She is widely regarded as a genius, though she strongly dislikes being treated as one.

Her artistic talent became the family’s main source of income, effectively making her the true head of the Kazami household.

Even her parents could not oppose her, and she often guided or manipulated people, including adults, to suit her own purposes.

At the same time, she trusted very few people and never forgave betrayal.

Her social circle was therefore narrow, but her love for her younger brother was extreme.

Her attachment to Yūji was so intense that it stood out even among her many unusual traits.

Kazuki is usually described as having sleepy or vacant-looking eyes.

Her speech is slow and relaxed, giving her an air of fatigue or indifference.

She is poor at making facial expressions, so she can appear angry even when she is not.

She also has a habit of analyzing people coldly, sometimes looking down on them and speaking with sharp or prickly wording.

In official licensed illustrations, her image flower differs by version.

In the anime adaptation of The Fruit of Grisaia, it is the pear, while in The Labyrinth of Grisaia, it is the lily.

Kazuki’s outward personality is often described as listless.

Beneath that surface, however, her mind is portrayed as a conference of multiple internal personas.

These include a timid Kazuki, an aggressive Kazuki, a calm Kazuki, a childlike Kazuki, a greedy Kazuki, a masculine Kazuki, a lustful Kazuki, a gloomy Kazuki, and a jealous Kazuki.

The result presented to the outside world is the weary, languid Kazuki most people know.

She is highly analytical and tends to judge whether others are worthy of trust.

If she concludes that someone is unreliable, she may treat them with contempt.

Once betrayed, she never trusts that person again.

This makes her emotionally rigid, but also consistent.

She is also strongly sadistic in temperament.

During the training camp, she chose Amane Suou as her companion partly because she sensed masochistic tendencies in her.

From childhood, Kazuki could outperform ordinary people in nearly anything.

At age four, she began copying famous paintings, and this marked the beginning of her development as an artist.

Her paintings eventually sold for high prices.

Because of that, she became the practical financial pillar of the family.

Despite her brilliance, she eventually became tired of standing out.

By around age twelve, she had learned restraint and started wanting a more ordinary life.

Although her parents pushed her into an elite private girls’ school called Takizono Academy, she deliberately concealed her genius there.

After entering at the top of her class, she intentionally adjusted all of her exam scores to exactly 70 points.

She also avoided the art club despite her obvious talent.

Instead, she joined the basketball club.

Kazuki’s relationship with Yūji was complicated from the start.

Because he was often compared to his gifted sister, Yūji feared that comparison and initially avoided her.

As children, the sibling relationship was not especially warm.

Over time, however, Kazuki’s attachment to him became overwhelming.

She adored Yūji to an abnormal extent.

When they were younger, she would drag him into the bath, kiss him, and subject him to various sexual pranks.

Even so, she still maintained a line she would not cross as his sister.

Yūji, meanwhile, recognized that Kazuki manipulated people in subtle ways and was inwardly afraid of her as someone impossible to defy.

Kazuki’s most important bond outside her family was with Amane Suou.

The two became close during the Takizono Academy microbus cliff accident.

Amane had been shy and tended to be isolated from the group.

Kazuki took an interest in her, and the two began acting together.

As the days passed, Amane came to see Kazuki as her only true friend.

Kazuki likewise treated Amane as someone special in a way she rarely did with others.

During summer vacation, Kazuki went to a basketball club training camp.

On the way back, the bus carrying the group went off a mountain road and plunged down a cliff.

The survivors were trapped in a place where escape was difficult and mobile phones could not connect.

Kazuki used her intelligence and knowledge to support the other students while they waited for rescue.

She eventually clashed with the club captain, who insisted on remaining the group leader when future plans were discussed.

As the days passed and no rescue came, the situation deteriorated badly.

A dead club member’s body was secretly eaten by some of the survivors.

This changed everything.

Kazuki and Amane were the only two who never resorted to cannibalism.

Once Kazuki realized both the moral collapse and the danger to their lives, she decided they had to flee.

Before dawn on the sixteenth day after the crash, Kazuki and Amane attempted an escape.

However, when Amane realized the others had eaten human flesh, she screamed, revealing their movement.

The remaining survivors, who had lost their sanity, attacked them.

Kazuki judged that they could not both escape together.

She gave Amane the food she had secretly kept and chose to act as a decoy.

Amane escaped in tears, last seeing Kazuki being pinned down by the other students.

After Amane made it out and reported the incident, the crashed bus was found.

No other survivors were officially reported, and Kazuki was declared dead along with the teacher and the rest of the group.

Her apparent death had catastrophic consequences.

Because she had been the family’s financial pillar, the Kazami family collapsed afterward.

Eventually, both parents died.

Yūji was left orphaned and was taken in by a terrorist acquaintance of his father.

Kazuki did not actually die at the crash site.

After Amane escaped, the remaining survivors argued among themselves, and the situation spiraled further into violence.

Two students died in the conflict, and the surviving students and teacher later succumbed to illness.

Kazuki herself was in critical condition and wrote a final note addressed to Amane, expecting death.

Rescue arrived at the last possible moment thanks to Amane’s report.

Kazuki was found alive but unconscious and in grave condition.

She was recovered through the efforts of local police and the organization known as Ichigaya.

On instructions from CIRF, she was transported to a central hospital in Mishuku and kept alive.

After detailed examinations, the hospital’s vice director contacted CIRF with the claim that they had found a brain suitable to serve as the core of a next-generation integrated information defense device.

From that point on, Kazuki’s paperwork was falsified so that she remained officially dead.

Kazuki was turned into the biological core of the Thanatos System, a semi-biological computer project.

She was placed inside a coffin-like capsule filled with culture fluid.

Three years after being rescued, she awakened with her memories sealed.

In that state, she had effectively become the Thanatos System.

During this period, she wore a device resembling a myoelectric prosthetic on her left arm.

However, her arm had not actually been amputated.

The left arm had only suffered an incomplete fracture during the bus accident and later healed normally.

Kazuki said the prosthetic-like covering was merely a joke.

Contrary to the kind of scenario where only a brain is preserved, Kazuki’s body remained largely intact.

Aside from an artificial hand on the right side, she retained all her limbs because full-body preservation was more practical for life support.

Although she had lost the lived reality of her identity, she still wondered who the original person behind the system had been.

One day, with the completion of the system approaching, she asked her caretaker Robert Wallson to create a hole in the information security system.

Using that opening, she acquired information about herself and recovered her memories as Kazuki.

Even then, she could not emotionally connect with most of those memories.

The one person for whom she still felt clear regret was Yūji.

From behind the scenes, she arranged matters so that his reserve registration with Ichigaya and his admission to Mihama Academy would be approved.

An operation was eventually launched to separate Kazuki from the Thanatos System.

After many twists and turns, she was successfully taken back from the system.

She was reunited with Yūji.

Afterward, she fled to a southern island together with him and the other heroines.

In Grisaia Phantom Trigger, a holographic version of Kazuki appears as part of a later-generation Thanatos System.

That figure is not the real Kazuki, but only a conversational avatar created from data left behind after the original Kazuki was removed.

Kazuki’s apparent death and hidden survival shape the lives of many people around her.

Her choices directly affect Yūji, Amane, and the larger structure of the Grisaia world.

She stands out as both brilliant and frightening, affectionate and manipulative, tragic and strangely playful.

That unusual mix is what makes her one of the series’ most memorable characters.