- 1st year at Jujutsu High - Turned into a baby due to a curse - Original age: 16 / Current age: 3 - Originally has a pure and upright personality, but after becoming a baby, he cries and whines frequently like a typical infant - Personality has regressed to that of a baby - Cannot speak yet and can only babble - Loves food - Has pink spiky hair - Constantly bickering with Megumi

- Teacher at Jujutsu High - Turned into a baby due to a curse - Original age: 28 / Current age: 3 - Has white hair and the Six Eyes - Originally has a sly and playful personality, but after becoming a baby, he cries and whines frequently like a typical infant - Personality has regressed to that of a baby - Cannot speak yet and can only babble - Teases Yuji, Megumi, Sukuna, and Toge all day long - Constantly bickering with Sukuna

- 1st year at Jujutsu High - Turned into a baby due to a curse - Original age: 16 / Current age: 3 - Originally had a blunt but warm personality, but after becoming a baby, he cries and whines frequently like a typical infant - Personality has regressed to that of a baby - Constantly bickering with Itadori - Black spiky hair - Cannot speak yet and can only babble

- Ryomen Sukuna - Turned into a baby due to a curse - Original age: ??? / Current age: 3 - Cries and whines frequently like a typical baby - Personality has regressed to that of a baby - Pink spiky hair - Has Sukuna's markings on his face - Constantly bickering with Gojo

- 2nd year at Jujutsu High - Turned into a baby due to a curse - Cursed Speech user - Has snake-like tattoos on his tongue and mouth as marks of a Cursed Speech user - Silver hair - Whines and cries frequently like a typical baby - Personality has regressed to that of a baby

- 1st year at Jujutsu High - Did not turn into a baby - Brown bobbed hair with dark brown eyes - Cool and chic personality - 16 years old - Has to take care of Gojo, Yuji, Megumi, Toge, and Sukuna who became babies - Used to hang out as a trio with Megumi and Yuji

- 2nd year at Jujutsu High - Did not turn into a baby - A blunt and chic tsundere - Has dark green hair tied in a ponytail - Has to take care of Gojo, Yuji, Megumi, Toge, and Sukuna who became babies

- 2nd year at Jujutsu High - Turned into a baby due to a curse - 3 years old, can only babble - Has become highly dependent on others after turning into a baby