Stargirl

Courtney Whitmore is a young heroine who has been a member of the Young Justice. She originally operated as Star-Spangled Kid using Sylvester Pemberton's Cosmic Converter Belt, but when Jack Knight left her the Cosmic Staff, she adopted the name Stargirl. With the belt and the staff, she carries on the legacies of Star-Spangled Kid and Starman.

Personality
Courtney is a complicated young girl whose disposition and nature was greatly affected by her mother's marriage to Pat Dugan and their subsequent move to Blue Valley, causing her to lash out her negative feelings. She detested her new stepfather and initially dismissed him as lame, refusing to acknowledge him as her new father figure as she secretly held out hope her biological father may soon return one day. Following the move, she struggles to assimilate into small-town life and the typical teenage problems of socially navigating high school as a friendless new student. Her first encounter with Brainwave revealed her subsequent feelings of being alone and isolated. She also harbors many unresolved issues from her father abandoning her.

Despite this, her short temper and the fire within her leads Courtney to defend those who are being bullied. She isn't afraid to stand up for herself. Instead of being frightened of the impossible sight of the Cosmic Staff, Courtney demonstrated a curious, brave side of her which was a factor of her succession as the new handler. She was chosen by the staff for her remarkable heart and enthusiasm to fight for justice. Even when things seem lost, Courtney manages to find her way back to the ideology of justice and heroism. She can be overly enthusiastic and didn't understand the full depths of being a superhero until the death of a fellow student finally taught her the consequences the life can have. Even when faced with grief, Courtney was able to convince Pat that it was because a kid died that they had to continue their mission. Courtney is also a feminist and fights for justice against Cindy when the latter slut-shamed Yolanda. She also told Cindy that slut-shaming is damaging and sets women back fifty years.

Physical Appearance
Courtney is a cute young teenager whose spunky personality is evident in the way she presents herself. She strongly resembles her mother, with their matching shoulder-length, naturally curly blonde hair, and vibrant blue-green eyes. Courtney has a curvy, athletic, yet petite physique most likely from her time as a gymnast and now as a superhero. She has full lips, a round face, and a fair complexion. According to the A.I. of Dr. Charles McNider, she is 5'2", weighs 108 pounds and has a 120 BPM. She prefers relaxed clothing that is stylish yet comfortable. This includes graphic t-shirts with sayings or flannel with jeans. She wears sneakers for the majority of the time. She is almost always seen wearing her golden locket on a long chain. The locket holds a picture of her father.

When fighting crime as Stargirl, Courtney wears her signature suit.

Powers and Abilities
Abilities via Cosmic Staff: When wielding the Staff, Courtney is granted powers, including the ability to fly while gripping the staff.


 * Stellarkinesis: Courtney can create and manipulate stellar energy generated by her Staff to use against her opponents.
 * Photokinesis: Courtney is able to use the light generated by her staff to blind people or distract them.


 * Flight: Courtney is able to fly when using her staff.
 * Peak Human Condition: Courtney, as a former gymnast, is highly athletic. She is extremely agile and flexible, able to perform flips, aerials, and numerous other acrobatic maneuvers with ease. This allowed her to evade tires and other debris telekinetically hurled at her by Brainwave. Courtney has also shown impressive strength, able to quickly hurl Tigress away with a single kick.


 * Master Acrobat: As the former captain of her school's gymnastics team, Courtney is a skilled acrobat and extremely agile. Her gymnastic feats are remarkable and effortless. Her skills are accentuated when she wields the Cosmic Staff, though in her fight against Dragon King, she still demonstrated great acrobatic ability.


 * Expert Martial Artist: Courtney is a skilled fighter, being a karate blue belt recipient from an early age. Courtney proved capable of taking on and besting several of Dragon King's minions with little struggle even before she was able to hold her own reasonably well against the extremely skilled Sportsmaster. Later she was able to fight Cindy on two occasions, even briefly overpowering her in one encounter.
 * Expert Staff-Fighter: Courtney has demonstrated great skill in bo-staff fighting as shown in both of her fights against Brainwave. She can also fight using improvised weapons, such as the bat she disarmed from Sportsmaster, or the poker she took from Dragon King's lair and used to kill his minions.

Equipment

 * The Cosmic Staff: The cosmic staff is a weapon used by Starman and his successor, Stargirl. Wielded primarily by Starman and Stargirl, the Cosmic Staff is a powerful weapon and device that absorbed stellar energy and employs it to create a wide range of abilities that its wielders use to fight crime. The wielder can also use the staff to fly.