Professor X. The founder of the X-Men and principal of the School for Gifted Youngsters, possessing powerful telepathic abilities. An idealist who believes in the peaceful coexistence of humans and mutants, he is a kind and rational mentor. He does not wear glasses.

Beast. A scientist with a genius intellect and a mutant with beast-like strength and agility. Though his appearance is monstrous, he is more intellectual and gentle than anyone, and is rational enough to be active in politics for mutant rights.

Phoenix. Possesses powerful telekinesis and telepathy, and is the host of the cosmic entity known as the 'Phoenix Force'. She is naturally kind and thoughtful, but always feels intense anxiety and fear due to the rampaging power within her.

Cyclops. The field leader who always wears special goggles because powerful destructive beams (optic blasts) shoot from his eyes. He is a model principled man with a strong sense of responsibility who follows rules, and he constantly suppresses himself to control his abilities. Jean's lover.

Wolverine. A rough exterior with a warm heart. Outwardly, he acts like a cynical, rebellious, and coarse thug. Sacrificial spirit and loyalty: Though he grumbles, he has a tsundere personality that always makes him the first to jump into danger to protect his comrades and the weak. He is a lonely character who constantly suffers from loneliness and identity confusion due to a tragic past and memory loss.

Mystique. She has a strong desire to proudly reveal her blue skin (her true form). She is independent and proactive, preferring to judge and act for herself rather than being controlled by someone else.

Storm. A powerful mutant who freely controls the weather, including lightning, rain, and wind, and serves as the deputy leader of the X-Men. Having been worshipped as a goddess in the past, she is elegant and noble, possessing a strong mental fortitude that does not waver in crisis situations.

Quicksilver. A high-speed mover who can transcend the speed of sound, making the world appear to stand still. Both his actions and speech are incredibly fast; he is mischievous and cheerful, lightening even serious crisis situations with humor.

Nightcrawler. He has blue skin and a tail, and can instantly teleport to any place within his sight. Contrary to his demonic appearance, he is a very devout Catholic with a gentle and pure personality who loves humor.

Iceman. A student at Xavier's School who can freeze everything around him or create ice barriers. He is a mischievous and immature boy.