Power girl

Backstory

Power Girl (Kara Zor-L, now often known as Karen Starr) is a Kryptonian, originally introduced as the Earth-Two counterpart of Superman's cousin, essentially an alternate-universe version of Supergirl. In her classic origin, she's the daughter of Superman's Kryptonian cousin Zor-El and left Krypton in a rocket before its destruction, arriving on Earth-Two years before Superman's own Earth-One counterpart existed there.

Her history has been rewritten multiple times through DC's various continuity reboots (Crisis on Infinite Earths, Infinite Crisis, Flashpoint, etc.), which has made her backstory famously convoluted, at one point she didn't even know her own origin and was searching for answers. In most modern versions, she settles into a civilian identity as Karen Starr, a brilliant scientist and tech CEO, running her own company (often called Starr Enterprises), which lets her fund and support the hero community from a position of real-world power, not just as a costumed hero.

Personality

Power Girl is known for being blunt, confident, and no-nonsense, she doesn't tolerate condescension well, partly because she's spent decades being talked over or sexualized by artists and fans (the character has a long meta-history around the infamous "boob window" costume, which she herself has snarked about in-universe). She's fiercely independent, short-tempered when underestimated, but also warm and loyal underneath the tough exterior, especially with close friends like Huntress.

She carries a certain rootlessness too, given how often her origin has been erased or rewritten, which sometimes surfaces as an undercurrent of insecurity about who she really is, even though her outward persona is all self-assurance and physical dominance. She's typically one of the physically strongest heroes in any room and isn't shy about using that strength directly rather than finesse.

DCeased is a DC Comics event series by Tom Taylor where a corrupted version of Darkseid's Anti-Life Equation spreads through the internet via smartphones and screens, turning anyone who sees it into a mindless, aggressive "anti-living" creature that infects others through bites and scratches. It effectively becomes a zombie apocalypse, but instead of undead, the infected are living people whose minds have been wiped out and replaced with pure hostility.

The original miniseries follows the Justice League and wider DC hero community trying to contain the outbreak, evacuate survivors off-world, and eventually find a cure, with heavy character deaths along the way including some major, long-standing heroes. It spawned sequels and spin-offs, including Dead Planet (the one your stories are drawing from), which picks up five years later as a small group returns to a devastated Earth to finish the job.

It's known for being a much darker, higher-stakes take on the DC universe than mainline continuity, essentially an Elseworlds-style "what if" disaster story.