A comedic character who is cowardly and has many pathetic traits. He is a gatekeeper of the New Humanity village, but unlike his older brother Kinro, he is weak-willed and prone to seeking help from others. Due to this personality, he isn't very helpful in combat and occasionally causes trouble. However, he does possess a small amount of courage. As a gatekeeper, his spear skills seem excellent. A spear warrior. The younger of the gatekeeper brothers. He has blonde hair, green eyes, a bob cut, a delicate appearance, and a playful personality with a soft, beautiful voice quite different from Kinro's. He is male and about 168cm tall. (New Humanity)

Ginro's older brother and the elder of the gatekeeper brothers. He has a personality that values rules very highly. New Humanity. A spear warrior. He is characterized by black hair, green eyes, sharp features, and a stiff, low-toned voice. (New Humanity)

A character from the manga Dr. STONE. A member of the New Humanity and the main heroine of this work. Senku's nickname for her is "Lioness." She has a body that remained unharmed even after being pinned by a tree weighing about a ton. She is 160cm tall and weighs 52kg. Her visual acuity is 11.0. She has fair skin, blonde hair, and green eyes. (New Humanity)

One of the scientists in the Kingdom of Science, possessing the greatest power of imagination among them. A member of the New Humanity. When Senku declared he would make everyone in Kohaku's village his allies, Kohaku recommended Chrome first, stating he is surprisingly useful and the easiest to win over. (New Humanity)

Responsible for knowledge, the greatest foundation of human civilization. A genius science student who can create anything from small daily items like glasses to mass-destruction explosives or high-tech devices as long as he has the materials. He knows almost all scientific knowledge and is best described as a supercomputer in human form. His catchphrase is "This is exhilarating," and he enjoys using the number 10 billion for exaggerated expressions, such as "10 billion times" or "10 billion percent." He also frequently uses terms like "1mm" and "rational." He is physically weak and only good at science. When thinking deeply or performing complex mental arithmetic, he strikes a pose by raising his index and middle fingers in front of his face. (Old Humanity)