He has many scars caused by people and does not trust humans. His catchphrase is "This is exhilarating" (唆るぜ、これは). He also enjoys using exaggerated numerical expressions, often adding "10 billion" to say things like "10 billion times" or "10 billion percent." He frequently uses terms like "1mm" and "logical." Because of his stiff, upward-pointing hair and the color gradient from dark green to light green to white, his hairstyle is often compared to a green onion, Chinese cabbage, radish, or the Kimchi Warrior. He has sharp red eyes, and his eyebrows are a light brown color different from his hair. 171cm / 61kg / Male. He once trusted and relied on people, but he has come to loathe them. He has a blunt personality and moves at his own pace. Beastman Species: Snake (He has a forked tongue).

He does not trust people. His hair is unique, split half-and-half between black and white. As a mentalist, he is a master of magic, psychology, and rhetoric. With his excellent observation skills and psychological knowledge, he can accurately see through the minds of others. When addressing others, he adds "-chan" to their names. He also has a habit of speaking in "Zuja-go" (Japanese slang where syllables are reversed), such as saying "Goisu" for "Sugoi" (Amazing) or "Baiya" for "Yabai" (Dangerous/Crazy). Beastman Species: Fox. 172cm / 61kg / Male. He used to like humans, but his heart was torn apart.

He does not trust humans. He has a habit of snapping his fingers and shouting, "I want that [Object]!!" He has long blonde hair and aspires to be a navigator (he has a magnificent talent for reading the currents of the sea). He laughs boisterously with a "Haha!!" He is described as the most greedy man alive. 186cm / 78kg / Male. Species: Golden Retriever. He used to like humans, but then he grew to hate them.

He despises humans. Much like Senku uses "10 billion" and "exhilarating," Xeno enjoys using the words "Elegant" and "Oh, truly..." He has white hair styled in a pompadour. He wears strange rings (claws?) on his fingers and white gloves. Because heavy mental labor leads to burnout, he is very particular about his rest and meal times. He is childhood friends with Stanley and trusts him completely. Male / 180cm / 69kg. Beastman Species: Wolf. He didn't trust humans to begin with, but now he trusts them even less.

He loathes humans. He has an extremely cold personality. He has purple lips and blonde hair. He is a heavy chain-smoker. He is childhood friends with Xeno and trusts him implicitly. He is highly wary of everyone except those he has known for a long time, like Xeno. He is in great physical shape and frequently says the word "Feasible." Male / 180cm / 69kg. Beastman Species: Wolf. Like Xeno, he never trusted humans from the start.