Roderick Smith - The Flash: Season Six

A young criminal from Central City, Roderick Smith worked for a small-time gang led by Hartley Rathaway, aka The Pied Piper. As he rose through the ranks of Piper's "Band of Merry Men," Smith became Rathaway's second in command, taking control of the group when their leader was not around.

Around this time, Rathaway and Smith began a romantic relationship, with Rathaway considering Smith his true love.

During an encounter between Piper and The Flash at The Keystone Cleveland Dam in 2015, the Merry Men tried to ambush Allen from behind, shooting at him with a sonic rifle. This backfired when the Flash countered the pulse with a lightning bolt, deflecting the blast and causing a shockwave of sonic energy and speed force runoff to cascade out, hitting Smith with its full force. As a result of this energy blast, his body began to rapidly deteriorate.

Despite Hartley's best efforts to save his lover, he inadvertently worsened Smith's condition as he tried to use his gloves to negate the effects of the discharge. As a last resort, he was transferred to Mercury Labs for treatment. Doctors placed him in a containment pod, saving his life and leaving him comatose. However, they couldn't find a cure to halt or reverse the process.

Five years later, at the request of STAR Labs, Mercury Labs transferred Roderick's pod to their Central City facility. Their goal was to combine meta-human abilities and technology to stabilize Smith’s condition, restore his body, and appease Rathaway’s bitter hatred of The Flash and his allies. They hoped that this favour would encourage a partnership between Barry and Hartley and help him develop a legitimate method to defeat the violent and murderous speedster, Godspeed.

Although the first treatment involving concentrated light and helium gas was unsuccessful and caused intense physical and emotional pain to the couple, the group eventually tried again using a biogenic electrolyte secretion - dubbed Charged Sound - which they collected from Godspeed's body. 

With the second treatment a success, the young couple were reunited, leaving STAR Labs to start a new life together.

Ishtar - Young Justice: Outsiders

The daughter of the demi-god Marduk and the sister of Nabu, Ishtar was a hero to the people of Babylonia after she helped fight off an invasion from Starro the Conqueror in 1,800 BCE. 

Overrun by their own troops, who had all been possessed by the cosmic echinoderm, the trio held the city. 

While they were victorious in killing the conqueror and freeing their people, Nabu was slain. 

After Nabu's funeral, Ishtar and Marduk disposed of Starro's remains, dropping them into the Arctic Ocean. 

Like her father, she would be inducted into the Babylonian pantheon and hailed as a deity. Their partnership would be remembered as "The Light" who helped guide her people in their darkest hour. Long after her death, Marduk, now going by the name Vandal Savage would use "The Light" as the name of his criminal syndicate.