Born with the ability to create destructive seismic vibrations, Daisy Johnson was taken in by SHIELD at an early age and placed under the direct supervision of its Director, Colonel Nick Fury. Learning all the tricks of the spy trade and how to harness her abilities to their fullest extent, Daisy became one of Fury's top agents and one of the few agents of SHIELD to enjoy extremely sensitive security permissions.

Henry Jerome Sledge was born with the ability to absorb and mimic the properties of any material he touched. He spent his life drifting from one foster home to the next, always in trouble due to his temper. He was part of the team hired to infiltrate SHIELD and steal the Caterpillar List but began to regret his decision. To make amends, he joined the Secret Warriors and Quake appointed Composite as acting field leader of the team, seeing in him a potential for greatness despite his troubled past. Composite remains unsure he's worthy of such a position.

Jeanne Foucault grew up the spoiled, rich brat of French-American industrialists. At the age of five, her ability to learn information and skills at an accelerated rate kicked in and her parents put her on the fast track for college. Unfortunately, at age nine Jeanne's parents were murdered when a jealous employ killed them and took control of their company. Jeanne ran away from home and lived on the streets, learning everything she could about how to survive. She turned these skills into a career as a world-class thief, taking the name of Finesse. She joined the Secret Warriors during a botched job that involved her trying to steal the Caterpillar List from SHIELD for Fagin.

As the only child of a single-parent household, Frankie learned to get by without a father and with a mother that worked long hours just to make ends meet. When he discovered his hydrokinetic powers, Frankie used them to become a thief in order to provide for his family and to also attain everything he thought was denied to him by the world. A man named Fagin hired him to help steal the Caterpillar List from SHIELD but when the job spiraled out of control, Wipeout ended up joining the Secret Warriors instead.

Sebastian Druid showed signs of being different from an early age. The "imaginary friends" he had as a child weren't so cute when he continued talking to himself well into his teens. Psychiatrists diagnosed him with schizophrenia and his foster parents immediately had him committed to a mental institution. No one understood that the voices Sebastian heard were those of ghosts or that he had natural magical abilities because he was the son of Anthony Druid. When Daisy sprung him from the asylum to be a Secret Warrior, Sebastian jumped at the chance to experience life outside the asylum and outside the world in his head.

Life was relatively normal for Stephanie Sydney aside from the fact that she lived with her adopted uncle and that she discovered a superhuman ability to manipulate light. Her normal life was shattered the day that HYDRA agents tried to murder her because she was on the Caterpillar List. When the Warriors' first mission as a team resulted in the tragic death of her uncle, Neon remained with the team because they were the only family she had left. Since then, she's tried to be the moral compass of the team all while looking for information on her parents.