Charlotte Gage-Radcliffe lived with her mother and her newborn sibling in an apartment in Metropolis's worst slum. She never met her father.
Charlie knew she had superpowers from a young age, but rarely used them, because they made her mother uncomfortable. She was a big fan of Barbara Gordon's Batgirl.
The landlord of the apartment building had bribed the safety inspectors. The fire escape had been removed, and the smoke detectors were broken. When a fire broke out, Charlie and her family were trapped in the apartment.
In Charlie's experiments with her powers, she had discovered that living beings didn't survive teleporting with her - she couldn't get her family out. In the end, Charlie's mother made her leave, shouting at her to teleport out.
Seventeen people died in the fire. The landlord's sentence was six months, time served.
Some while later, Charlie surfaced as a crime-fighter in Gotham City, using the Batgirl name and wearing a homemade Batgirl costume, complete with utility belt.
This drew the attention of Barbara Gordon, now operating as the all-seeing master hacker Oracle (DC), who sent out her team of operatives, the Birds of Prey, to discover who was using her old identity.
The Birds laid a trap for the new 'Batgirl' in the hopes of confronting her. When Charlie showed up, she leaped into combat, enjoying the chance to go up against the Birds, all the while talking as if she'd been their friend for ages.
When they were confronted by a gun-runner seeking revenge for her imprisonment at the Birds' hands, Charlie teleported in to take a gunshot intended for one of the team. However, as the Birds went to Charlie's assistance, she disappeared.
Charlie reappeared in Oracle's control room, without a scratch on her. She revealed that she'd been in and out of Barbara's control room on numerous occasions, without Barbara's knowledge, and wanted her approval to become the new Batgirl. Barbara, identifying Charlie as untrained and ungrounded, tried to talk her out of becoming a superhero, and thought she'd succeeded when Charlie agreed to stop being Batgirl. However, before Charlie left, she told Barbara that while she'd promised to stop being Batgirl, she'd never said she'd stop being a superhero, leaving Barbara utterly frustrated.
Charlie popped up again a couple of weeks later, this time using the name Misfit. She tagged along with the Birds on a couple of missions, doing what she could to help out.
When Barbara managed to get some downtime, she followed up on a tip she'd received from Spy Smasher, which led her to Charlie's last known address - the burned-out shell of Charlie's old apartment block. When Charlie showed up, she confessed what had happened to her family, and that she was currently homeless. Barbara took her in as one of her team, giving her a home.
Powers & Abilities
Misfit is able to teleport anywhere she wants to go, appearing and disappearing in a burst of pink-purple smoke. She calls this power 'bouncing'. However, if she teleports a living being with her, it does not survive the trip.
Sensor Invisibility: Misfit is invisible to motion detectors, even those designed to catch the presence of intangible visitors.
Charlie has worn a utility belt as both Batgirl and Misfit. When she was using the Batgirl identity, the belt contained a batarang and a Batline (a grapple line with a bat-shaped hook). Whether Charlie still has these as Misfit is so far unknown.