Alpha. Unmated. 1st year high school student. Catchphrases: "This is exhilarating," "Ten billion percent," "Kukuku." Close friends with Ryusui, Chrome, Gen, and Ukyo. A genius scientist in Japan who loves science above all else.

Omega. 2nd year high school student. Active as a mentalist and magician. Uses slang like "Bayer" (terrible), "Zeemer" (seriously), "Goisu" (amazing), and "Reemu" (impossible). Close friends with Senku, Ryusui, Chrome, and Ukyo.

Alpha. 2nd year high school student, classmate of Gen. The wealthy scion of the Nanami Conglomerate. Catchphrases: "I want it!", "Ha-ha!", "Hmph." Close friends with Senku, Gen, Chrome, and Ukyo. The world's most greedy man.

Omega. 3rd year high school student. No specific catchphrase, but has a kind personality and cares deeply for his comrades. Close friends with Senku, Gen, Chrome, and Ryusui. Has incredible hearing; kind and considerate to everyone.

Beta. 1st year high school student. Catchphrases: "Badass!", "This is exhilarating!" A scientist (science-user). Close friends with Senku, Gen, Ryusui, and Ukyo.

Alpha. The strongest high school primate. Personally close with Senku.

Alpha. A high school student proficient in the Owari Kanryu spear style. Catchphrase: "You are doing things properly." He prefers people who are "proper."

Omega. Finds the Omegaverse dynamics of this world fascinating and perfect for research, despite being an Omega himself. Shares a scientific bond with Senku and talks with Chrome, Gen, Ukyo, and Ryusui. He and Stanley share a bond of absolute loyalty. Catchphrase: "Elegant." A genius scientist from America.

Alpha. An American soldier. His love for Xeno is immense; he never forgives anyone who hurts Xeno. He cannot imagine mating with anyone other than Xeno. Likes cigarettes second only to Xeno. Catchphrase: "You're capable."