Courtney Whitmore (Earth-2: Post-Crisis)

"My whole life I've waited for my father to show up and now I know why he didn't. Brainwave and the others took him from me. And the staff is giving me a chance to get justice for that. For my dad, for the JSA, for your friends."

- Courtney Whitmore

Courtney Elizabeth "Court" Whitmore is the leader of the Justice Society of America, a student at Blue Valley High School and the vigilante known as Stargirl.

Christmas Eve, 2010
On Christmas Eve, 2010, the JSA was killed. Following their deaths, Courtney is in their apartment waiting for her father to show up for their yearly visit. Courtney was heartbroken when her father never showed up that night. She and her mother, Barbara believed her father had abandoned them.

Moving to Blue Valley
In 2020, Courtney's family was moving to Blue Valley, Nebraska. Because Courtney had grown up in Los Angeles, and had long-lasting friendships there, she disliked the move from Los Angeles to Blue Valley. She blamed Pat for this move, claiming it was his idea. Her mother explains to her that she grew up in Blue Valley, and she took that new job at The American Dream, and that they made the decision together. Upon arriving in Blue Valley, Courtney is non-energetic and taking her anger out on Pat, ignoring him, and telling him that he is not her father.

Day One
During Courtney's school ID picture, she asks the school faculty member about joining the gymnastics team. She is explained that there is no longer a gymnastics team because the academic and athletic programs at Blue Valley High School had been recalibrated by The American Dream for optimal participation by the students and the faculty which disappoints her. During her lunch period, she can not find a seat, so she ends up sitting at "the looser table", as named by Beth Chapel. When Henry King Jr. comes over the table and starts bullying Yolanda Montez, and calling her a slut, Courtney quickly jumps in to defend Yolonda. Henry takes Courtney's phone, assumingly looking for inappropriate pictures on it, Courtney shoves him, causing Principle Bowin to give her detention. On her way to detention, she passes Cindy Burman, who reveals that Henry was her boyfriend and calls her a bitch. During detention, Courtney is annoyed by Rick Tyler's fidgeting, and disappointing in how who first day at school went. After detention, she heads out to the buss, missing it, and ends up walking home.

Finding the Cosmic Staff
When Courtney arrives home, Barbara asks her if she has any plans for the night. When she answers, "no", Pat then suggests that they go to the drive in. Courtney lashes out at him, telling him he is not his father and to stop acting like he is. When Courtney goes off into the basement, she kicks a box of Pat's stuff, breaking a picture frame, which reveals another picture behind it. When Courtney finds the picture of the JSA that pat took, she starts figuring out his past, and goes through his stuff, quickly learning his past as Stripsy, and as Starman's sidekick. When she notices a glowing box, she opens it to find the Cosmic Staff inside of it.

Vigilantism
After finding the Cosmic Staff, it instinctively takes her to the Drive-in, where Henry King Jr. with his friends, vandalizing other peoples vehicles. Courtney proceeds to put on a bandanna to conceal her identity, and begins letting the air out of Henry's tires. When she is caught, the staff seems to act of its own volition and defends her from oncoming attacks from Henry and his friends. After the staff knocks them down and defeats them, it fires a laser, blowing up Henry's father's car.

Confronting Pat
After destroying Henry's car, Courtney returns home, to be startled by Pat waiting for her in the basement. Courtney confronts Pat about knowing about the JSA and his past as Stripsy. When Pat explains to her that the staff is called the Cosmic Staff, and that it was only supposed to work for Starman, and that Starman and the JSA died saving the world on Christmas Eve, 10 years ago, the same day her father vanished, Courtney comes to the suspicion that Starman may be her father. Pat explains to her that that is just a coincidence, but Courtney believes it to be destiny. Pat explains they had costumes because people looked at those rather than their faces. He inadvertently inspires her to get a costume. Pat explains the danger about knowing about the JSA, and their killers, the Injustice Society of America Courtney does not seem to listen to Pat, and goes rushing off to ask her mother if her father was a superhero. Her mother explains to her, that only pat has been there for them, and that her father abandoned them. Because Courtney sees how happy Pat makes her, she decides not to tell her mother the truth about the secrets Pat has been keeping. Courtney then goes to talk to Pat on the front porch. She tells him that he sees how happy he makes her mother and will keep his secret as long as she stays out of her way.

Training
After Courtney goes to bed, the staff comes into her room, startling her, and causing her to scream, waking her mother. Her mother comes in to have a talk with her, but Courtney quickly ends that conversation because of the staff. After her mother leaves Courtney grabs the staff that is now by the window, saying it is cold outside. It pulls her out the window, and to a rooftop. Courtney asks what they were doing there, quickly realizing it wanted to train with her. Due to Courtney's background in Gymnastics, she was agile and able to quickly manage the staff. However, that does not stop her from failing on her first attempt to jump on the staff, causing her to fall. She is able to successfully jump on the staff and ride it correctly the second attempt.

Ambush
While riding the staff, Courtney notices tires flying through the air, but not fast enough. The tires hit Courtney and the staff, causing Courtney to fall off the staff toward the ground. The staff saves Courtney by catching her and slowing her fall. After she lands on the ground, she is tossed around telepathically by Brainwave. Once she enters the tire factory where she landed at, she is confronted by Brainwave. Brainwave talks to her through thoughts, and reads her thoughts, asking her why she is thinking of her father. Courtney begs the staff to do something to escape brainwave's clutch, and is able to break free of him. Once free Courtney uses the staff to cause a massive explosion around Brainwave. Although Brainwave survives using telepathic abilities, Courtney is able to escape.

S.T.R.I.P.E.
After Courtney escapes from Brainwave, she is startled by a giant robot, which is quickly revealed to be Pat. After she realizes it is Pat, Courtney does not trust him, telling him to stay away from her. Pat convinces her to trust her and she let's him get her out of there and somewhere safe. Once back at Pat's garage, Courtney's hands are shaking and tells the staff to just give her a minute. After Courtney calms down a little bit, Pat asks who attacked her, Courtney gives her description, and says he through tires at her with his eyes. Pat explains it was with his mind, and that his name was Brainwave, and he was a member of the group that killed the JSA, the ISA. Courtney asks if he killed her dad. Pat tells her Starman was not her dad, and that brainwave killed many JSA members that night, but that it was their leader, Icicle who killed Starman. Pat later explains he built the robot out of old car parts.

After Pat inadvertently inspired Courtney to get a suit for herself as Stargirl, Courtney took Starman's suit to school. Once at school, she re-purposed it to fit herself, and in the process destroyed the sewing lab.

Open House
At Blue Valley High's open house, Courtney and Pat know that Brainwave will undoubtedly show up there. They search for him during the open house, while at the same time, Brainwave is searching for them. Once Courtney sees Brainwave, and thinks about it, Brainwave hears her thoughts and is able to find her. During their confrontation at the open house, Brainwave reads Courtney's made and discovers she believes Starman is her father. He also discovers her real name, and about her mother. He threatens to kill her mother unless Courtney meets him at midnight with the cosmic staff. Once Brainwave leaves Courtney, she races to find pat, and tells him what Brainwave said. Pat makes up an excuse to tell Barbara, and get's her to leave the open house, and go home.

Battle with Brainwave
Once back home, Pat instructs Courtney not to go to face Brainwave, that he would, and if he was not home in the morning to get her mother and Mike, and leave Blue Valley forever. After Pat goes to face Brainwave, Courtney has a talk with her mother, who mentions how much she cares for Pat, which convinces Courtney to go and face Brainwave and protect Pat. Once she makes this decision she puts on her suit for the first time, and jumps off onto the staff. As Pat is quickly loosing the battle with Brainwave, Courtney arrives, and knocks Brainwave back with an energy wave from the staff. After dodging multiple attacks from Brainwave, Courtney gets hit by one, and loose reach of her staff. When Pat turns on his headlights, and temporarily blind Brainwave, Courtney uses the staff against Brainwave's mind which ends up frying his mind and putting him into a coma.

After the battle with brainwave, Pat and Courtney return to the garage, where Pat expresses that he lost confidence in himself, and that he was of no help, that she save him. Courtney then tells him that the staff chose her, and she chooses him. She then comes up with a better code name for pat then "Stripsy", she comes up with "S.T.R.I.P.E.", an acronym standing for "Subatomic Technical Robot Internet Pat Enhancer".

Powers

 * Powers via the Cosmic Staff: Courtney's powers come from the Cosmic Staff.
 * Flight: The Cosmic Staff allows Courtney to both levitate and fly.
 * Stellarkinesis: Courtney can manipulate stellar energy to use against her opponents.
 * Photokinesis: Courtney can use the energy generate by the cosmic staff to temporarily blind and distract people.

Abilities

 * Peak of Human Physical Condition: Courtney is at peak human condition due to being a former gymnast and can preform many maneuvers such as flips and aerials with ease.
 * Acrobatics: Courtney is a highly skilled acrobat due to her time on the gymnastics team in Los Angeles.
 * Skilled Martial Artist: Courtney is skilled in martial arts as shown in her fight against Brainwave.
 * Skilled Staff Fighter: Courtney is a capable staff fighter as shown through her use of the cosmic staff against Brainwave.
 * Sewing: Courtney was able to create her suit from Starman's old suit.

Current Equipment

 * Stargirl Suit: Courtney wears a protective suit whilst operating as Stargirl.
 * Cosmic Staff: Courtney uses the Cosmic Staff, a weapon invented by Ted Knight that gives her abilities such as flight and energy manipulation.

Trivia

 * Courtney was on her school's gymnastics team in Los Angeles.