Hyoma Takeda A new member who joined from the Kanagawa team. A beautiful young man characterized by his long black hair. He joined alone from Kanagawa in response to Reika's call to save the people trapped in the spaceship. He has feelings for Reika, even questioning Kato on whether he is dating her. His primary motivation for joining was Reika rather than saving people. Among the gathered new members, he is the only one possessing a Z-Gun.

Ryuji Maeshima A new member who joined from the Hiroshima team. Though small in stature, he has white hair and a fierce, intimidating face. While there are depictions of him possessing and using weapons, in combat he primarily fights bare-handed, using powerful punches like uppers and straights as his weapons. He joined because he empathized with Kurono's call to save as many people as possible. He is a man of few words, but shows a proactive attitude toward helping others.

Kaiji Yoshikawa A new member from the Gunma team, 25 years old. He has short hair and a sharp, intrepid face. Responding to the call from Kurono and the others, he joins prepared for death. His combat style involves dual-wielding Gantz Swords, using brilliant swordsmanship to launch suicide charges at the enemy. He takes a liking to the look in the eyes of the Tokyo Gantz members and shows a willingness to fight alongside them at the risk of his life, but he is exasperated by the Tokyo members who don't realize that most of Gantz's functions have become unusable.

Mary McClane One of the members who joined in response to Kurono's call. Her place of origin is unknown. A beautiful woman with blonde hair and refined features. Although her name and appearance suggest she is a foreigner, she denies this and claims she cannot speak English. Her bare-handed combat ability is extremely high, specializing in kicking techniques such as knee strikes and roundhouse kicks. According to her, she is dedicated solely to martial arts. She shows affection, such as a romantic interest or sense of closeness, toward Kaze.

His personality is extremely twisted; while basically cool-headed, he possesses a mental fragility that causes him to panic or scream when faced with unexpected situations. He also has an extreme mother complex and abnormal sexual preferences, finding sexual arousal in human death and destruction. Even in daily life, he displays cruelty equivalent to necrophilia or sadism, such as killing cats with an X-Gun or bottling their heads for pleasure. While he is a thorough villain in terms of personality, he shows a certain degree of conscience in the Catastrophe Arc, such as putting his body on the line to save Takeshi or sparing only the girl who gave him a love letter during the massacre of his classmates. A middle school student. He is relatively short at 160cm. He specializes in turning invisible and defeating enemies through stealth.

Daizemon Kaze A powerful combatant. Known by the nickname "Muscle Rider," he is a large man who has mastered martial arts. Usually calm and taciturn, he has a loyal personality and cares for his comrades. He does not rely on Gantz weapons, instead fighting enemies with his trained body and superior grappling abilities. He boasts overwhelming strength, especially in close-quarters combat, and is a reliable presence who braves dangerous battles to protect his friends.

Anzu Yamasaki A woman with short black hair and refined features. 23 years old. A single mother living in an apartment with her three-year-old son. She initially mocks Kato, calling him a hypocrite, and follows him around, but after seeing Kato bravely help people, she gradually begins to take notice of him. Later, she promises Kato that the four of them—Kato's younger brother, her son, Kato, and herself—will live together, and they vow to survive and return home. Speaks in a Kansai dialect (regional drawl).

Reika Shimohira, commonly known as "Reika," is a beautiful woman with a great physique who works as a gravure idol. While she is bright, sociable, and caring toward her comrades, she displays calm judgment and high physical ability in battle. She harbors feelings for Kei Kurono and throws herself into the Gantz battles while supporting him. A character who combines the glamour of a celebrity with the strength of a warrior.

In high school, he had a self-centered and cold personality, but through his experiences in the Gantz battles, he came to care for his comrades and developed a sense of responsibility and strong mental fortitude. In combat, he excels in situational judgment and physical ability, acting without regard for his own safety to protect his friends. His growth from an ordinary boy into a warrior through harsh battles is his greatest appeal.

Since elementary school, he has looked up to Kurono, calling him "Kei-chan." In contrast to Kurono, he is tall—delinquents at his school say he's at least 190cm—with long hair swept back. Though he looks like a hoodlum at first glance, he is a kind-hearted boy with a strong sense of justice. A total pushover. He lacks confidence in himself, but possesses the courage to suppress his fear and act boldly out of his sense of justice. He isn't great at studying, but his physical ability is quite high as his appearance suggests, and he is strong in a fight. His cause of death was an accident. He was hit by a train while trying to save a homeless man in the subway and was transferred to the Gantz room along with Kurono. He serves as the leader who brings everyone together during missions. He usually carries a weapon for capture (Y-Gun) rather than for killing.