Reep Daggle is from the planet Durla whose inhabitants, the Durlans, developed shapeshifting abilities to adapt to an environment destroyed by nuclear war.

Due to the Durlans' negative reputation, Reep applies for membership in the Legion to set a positive example to counter prejudice.

Chameleon Boy is imprisoned on Takron-Galtos for his espionage activities against the Khunds, but released after his heroics in The Great Darkness Saga.

He is the son of Durla's spiritual leader and heir to the title, though he refuses to accept the role, believing that he serves his people better as part of the Legion.

In Infinite Crisis, Chameleon Boy is included in the Legion, but is considered "missing"; Superman #696 reveals that he has been posing as a member of the Science Police.