Chris King and Vicki Grant

Chris King and Vicki Grant are depicted as two featured duo characters from DC Comics within the series "Dial H for Hero". They are portrayed as normal kids who can transform themselves as superheroes replacing Robby Reed during the 1980s.
Fictional character biography.
Original series.
The second "Dial H for Hero" series debuted in the 1980s, in a special insert in "Legion of Super-Heroes" #272 (February 1981), then ran in "Adventure Comics" #479–490 and continued in "New Adventures of Superboy" #28–49; the duo also appeared alongside Superman in "DC Comics Presents" #44. The original writer and artist in the series were Marv Wolfman and Carmine Infantino.
In this series, two other dials are discovered years later by teenagers Christopher "Chris" King and Victoria "Vicki" Grant of the New England town of Fairfax in a "haunted house". These dials — disguised as a watch and a necklace — only have the letters H-E-R-O on them, and work only for an hour, after which they will not work for another hour. King and Grant begin protecting Fairfax from a number of menaces. Unknown to them, most of these villains are created by a mysterious villain known only as The Master (who is obsessed with the H-dials for reasons unknown for most of the series) who creates them from the cell samples of unknown people.
While anyone could use Chris and Vicki's H-dials, they always turned the user into a hero, regardless of his or her personality; even The Master was temporarily made good by one. This fact has been ignored in later stories. On one occasion, a hero's persona overwhelmed the heroic Chris' own personality; as "Ragnarok, the Cosmic Viking", he possessed no awareness of Chris King's memories and acted with disregard for others' property and safety, going so far as to threaten police officers and swat away Vicki (as the miniature heroine "Pixie") when she attempted to talk him down, failing to recognize her as an ally. On a side note, it was a matter of contention with Chris when he first started using the dial that while Vicki changed into useful heroes with applicable powers, Chris's powers tended to be obscure and not particularly useful to defeat his opponent, such as when he changed into a super hero that could duplicate things and he outright began complaining about his useless ability. Indeed, it was that issue where Vicki showed Chris to think "outside the box" and use his temporary gifts creatively so they could be useful, at which point he helped defeat that issue's bad guy. Once this lesson was learned, Chris's super-hero changes became more relevant to the situation, but no explanation was given as to why this was.
Eventually Chris and Vicki discover that a fellow student named Nick Stevens has been drawing up superheroes as a hobby — and somehow, the dials turn them into those heroes. With Nick's help, they find out that their dials were created by a being called The Wizard (not to be confused with the DC Comics villain of the same name), whom the Master thought he'd killed years before. In truth, The Wizard faked his death while he looked for the original Hero Dial. With it, he merges with The Master — and transforms into Robby Reed, who explains that years before, he had used the dial to split in two (dialing "S P L I T") so that he could disarm a dead man's switch, while his other self, the Wizard, defeated the villain who set it. However, the Wizard carried all of Robby's inherent goodness, while the Robby that remained possessed only evil impulses; the original Hero Dial was lost when this Robby, renaming himself The Master, dialed "hide yourself", causing the dial to vanish along with The Master's and The Wizard's memories of their former life as Robby Reed. While The Master learned genetic techniques that allowed him to create his army of super-villains, the Wizard was driven to create the new H-dials, unconsciously designing limitations into them to prevent what happened to Robby from recurring (only heroic identities, a time limit, and the exclusion of letters other than H-E-R-O; the latter, however, did not prevent Chris from experimenting on one occasion and dialing H-O-R-R-O-R, with disastrous results). With Nick developing the ability to actively influence the dials' results (rather than subconsciously as before), Robby passes his dial to Nick, and retires as a hero.
In "New Teen Titans" #45 (June 1988), Victoria and Chris' history after the end of their series is revealed. After the two teens graduated from high school, they found they had gained the ability to transform without the dials — apparently because of their extensive use — but as a side-effect Vicki began experiencing mental problems. Vicki later joined a cult called the Children of the Sun, where she was physically and mentally abused, deranging her even more. She sought out her former partner Chris in order to kill him. With help from the Teen Titans, Chris rescued her (in "New Teen Titans" #46). Chris now finds that he changes into a new superhero every hour, without the dial, and remains that way until he expends an unspecified amount of energy. He decides to continue his superhero career, using a suit provided by S.T.A.R. Labs to monitor his changes.
In "Superboy and the Ravers" #5 (January 1997), Hero Cruz finds Vicki's H-dial in the lair of Scavenger, and uses it to gain superpowers. A still deranged Vicki returns in "Superboy and the Ravers" #13 (September 1997) to get her dial back from Hero, but she regains her sanity once she uses the device. She is last seen in the care of the Forces, a family of metahumans.