She first appeared in a special insert in The Brave and the Bold #200 (July 1983) and was created by Mike W. Barr and Jim Aparo.

Halo first appeared in The Brave and the Bold #200 (July 1983), and was created by writer Mike W. Barr and artist Jim Aparo.

[4] Halo is a gestalt of a human woman named Violet Harper and an Aurakle, an ancient energy being who originates from the Source.

She participates in the Infinite Crisis, World War III, and Blackest Night events, with the latter revealing her abilities to be effective against Black Lanterns.

An alternate universe version of Halo named Aurora appears in Justice League: Crisis on Two Earths as a minor member of the Crime Syndicate of America with powers similar to those of a Green Lantern.