The Core Four, also known as : The Fab Four, was the name of the group, consisting in : Ryan Atwood, his adoptive brother Seth Cohen, and their respective, former deceased girlfriend of Ryan, Marissa Cooper, and Seth's girlfriend, later wife, also Marissa best friend since childhood : Summer Roberts. The group was practically inseparable and always supported each other, ever since they became close friends.
Core Four : Atomic County counterpart
- Ryan Atwood (aka Kid Chino)
- Seth Cohen (aka The Ironist)
- Marissa Cooper (aka Cosmo Girl)
- Summer Roberts (aka Little Miss Vixen)