Characters in The 5th Wave

Cassie Sullivan

Also in The Infinite Sea

Ben Parish

Cassie's former high school crush, later known by the callsign "Zombie" after arriving at a military training camp; his chapters share the narration with Cassie's.

Colonel Vosch

Commanding officer of the military camp where surviving children are trained to fight the alien threat.

Evan Walker

Also in The Infinite Sea

Sammy Sullivan

Cassie's young brother, taken during the evacuation — finding him again is what drives her across the book.

Ringer

A sharp, calculating member of Squad 53 at the military training camp.

Also in The Infinite Sea, The Last Star