Halo is a fictional superheroine that appears in comic books published by DC Comics. 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 is a gestalt of a human woman named Violet Harper and an "Aurakle", an ancient energy-being resembling a sphere of iridescent color, the Aurakle species emerged from the Source billions of years ago at the dawn of time. When sociopath Violet Harper was murdered by Syonide, an operative of the 100 and Tobias Whale, the Aurakle, who had been observing her out of curiosity, was sucked into the newly vacant body, which it found itself animating. The shock of death and resurrection induced a profound amnesia in the new combined entity. As such, she was a complete innocent who was discovered by Batman who recruits her for the Outsiders. Regardless of her state of mind, Halo later has adventures in which she had to deal with the consequences of her body's previous occupant's actions, which required the assistance of the team to resolve. In one incident, early in her existence, Halo accesses the memories of the long-lived Aurakle and becomes emotional over the tendency of human beings to kill each other.
The young Halo is initially the legal ward of her friend and Outsiders teammate Katana. During her stint in the Outsiders, she gains a friend in new member Windfall.
Halo did die, in a manner of speaking, in a much later incident. After the team was framed for the murder of Markovia's Queen, which was caused by Roderick and his vampire forces, they were forced to flee. Technocrat's evil ex-wife, Marissa Barron hires an old associate named Ryer who believes Technocrat had abandoned him in Markovia. As the cyborg Sanction, he nearly kills the Outsiders in Switzerland. Later, in Gotham City, he attacks again, slaying both Marissa and Halo. As with Violet Harper, Halo's essence is sucked into Marissa's body, reanimating it.
During an attempt by the Outsiders to create a new headquarters, other Aurakles would return to reclaim Halo. Halo would later strike up a relationship with Sebastian Faust, a fellow Outsider that not many on the team trusted. The entire team is eventually cleared of wrongdoing. Halo later returns to Markovia. There she assists in combating a portal to hell that had opened as part of the Day of Judgment incident.