Wonder Girl's History
Young Justice
While assisting the Amazons whenever the opportunity arose, Cassie found herself wandering deeper into the world of superheroes. After being assaulted by the villain Harm, Cassie found herself recruited by Robin, Superboy, and Bart Allen, a group of teenage heroes known as Young Justice. Along with Arrowette, Secret, and Empress, Wonder Girl represented the second wave of Young Justice members, creating an honest team out of what was originally three sidekicks goofing off and fighting crime as an after thought.
During her tenure with Young Justice, Wonder Girl grew into a full-fledged superhero. She took over leadership of the team when Robin stepped down from the post, all while cultivating a crush on Superboy and close friendship with Secret and Arrowette. It was during this period that Cassie's secret identity was revealed to the public when she was forced to defend her high school against an attack by Wonder Woman's nemesis the Silver Swan who thought that she should be Wonder Girl.
Just as Wonder Girl began settling into her leadership role, the Teen Titans and Young Justice were offered sponsorship by a mysterious corporation called Optitron. While mulling over the pitch, both teams were assaulted by Indigo, a misunderstood android who unwittingly activated a homicidal Superman robot. Donna Troy was killed in the ensuing battle, an incident that left the heroes shattered. Depressed and guilt-ridden over the death of her friend and idol, Cassie contemplated retiring from superheroics.
Joining the Teen Titans
Instead, she found herself persuaded to join a new incarnation of the Teen Titans, reformed from the ashes of Donna's death by Cyborg, Beast Boy, and Starfire. Wonder Girl fought alongside former Young Justice teammates Superboy, Robin, and Impulse (now going by Kid Flash), as well a de-aged Raven and new recruit Speedy. The new team came up against a litany of threats from the original incarnations past, fending off assaults by Deathstroke, Brother Blood, The Fearsome Five, and Dr. Light. She also found herself constantly confronted by the Olympian Ares, who gave her the lasso she currently uses.
While a member of the Titans, Cassie surmised the true identity of her father. After assisting Wonder Woman in defeating Hades and restoring order to the Olympian Pantheon, Cassie was granted one wish which she used to force the revelation of her true parentage -- Zeus himself. Zeus and Helena Sandsmark had a dalliance while Zeus was disguised as a human, resulting in the now half-Olympian Cassie.
Cassie also finally began dating Conner Kent, the then current Superboy. They enjoyed a comparatively normal courtship until Lex Luthor activated long-latent mind control of Conner, resulting in Superboy brutally attacking the combined forces of the Teen Titans and the Outsiders. It was Cassie who eventually returned Superboy to sanity, but the incident resulted in his leaving the Titans and therefore his relationship with Cassie.
Wonder Girl continued to fight alongside the Titans, including venturing to the planet of New Cronus to save the life of Donna Troy, until the Infinite Crisis hit. When the Olympian gods left Earth following an attack by Maxwell Lord's OMACs, Cassie found herself without her power source. She reluctantly accepted half of Ares' godly abilities, a gift from the war god in exchange for Cassie accepting him as her brother.
Infinite Crisis
As the final battle with the maniacal Alexander Luthor loomed, Cassie reunited with Conner, followed by the two finally consummating their relationship. Their newfound love was not to last, however, as Superboy died heroically while single-handedly destroying Luthor's universe-generation machine.
After Superboy's death, a depressed and vulnerable Cassie found herself taken in by a Kryptonian resurrection cult in hopes of bringing Superboy back to life. She ultimately saw through the "Cult of Conner" with the help of Ralph Dibny, the Elongated Man (even if it seemed they may have stumbled onto some true results in their resurrection ceremony).
One Year Later
After regaining her senses, an increasingly violent and erratic Wonder Girl began a career as a solo superhero by tracking the Brotherhood of Evil. This search brought her to Robin's new Teen Titans team, whose membership she accepted begrudgingly. Still unable to fully cope with Superboy's death, Cassie found herself working alongside Robin in the hopes of resurrecting Conner -- all while trying to control a new and unwanted attraction to the Boy Wonder. Wonder Girl and Robin did share a kiss in front of Superboy's costume, and Cassie then ran away crying. Nothing came of the kiss and the attraction seemed to have ended.
The Teen Titans were called on to save Raven from Bombshell, who was hired by Deathstroke the Terminator to get Jericho's disk back since it held his soul. Raven used one of Brother Blood's spells to give Jericho a new body cleansed of the evil force that once held him in its thrall. Wonder Girl asked if Raven could do the same for Superboy, but Raven said that Conner's soul had moved on into the afterlife and she could not bring him back.
The Titans were kidnapped by the Titans East and the two teams fought. It was very hard for Wonder Girl and Robin since a Superboy look-alike ( Match, a bizarro version of Connor) was there, and he looked and spoke just like Conner. Match even went as far as to say that he was Conner. This enraged Wonder Girl, but Match seemed to truly have some memories that belonged to Conner, so Cassie stopped fighting him for a moment. Match took this opportunity to knock her and Robin out.
The entire team was now beaten, until Nightwing, Donna Troy, and Flash showed up and helped defeat the Titans East.
The Leader of the Teen Titans
The Titans then took a drastic new turn. When Robin left to return to Gotham after the death of Batman, Cassie became the team leader. Miss Martian and Ravager left the team. After Wonder Girl told Supergirl that the only reason they were friends was because she was her only remaining link to Conner, Supergirl also quit the team. Cassie was left with Red Devil and Blue Beetle, but soon recruited other new members -- Bombshell, Static, and Aquagirl, and Miss Martian eventually returned.
Wonder Girl found herself leading a new team that had very little experience in working with each other, which was incredibly difficult since she had even less experience at leading a team. When Titans veteran Beast Boy arrived and told Wonder Girl that the Teen Titans needed a real leader, Wonder Girl and her team remained adament that Cassie was the true leader of the Teen Titans. The mystical enemy known only as Wyld arrives and attacked Raven. This led to Raven rejoining the team and the Titans fighting off Wyld and his horde.
Wonder Girl has remained the leader of the Teen Titans, growing in confidence as the team becomes tighter and more efficient. On a mission in Dakota, Wonder Girl and her team do battle with Holocaust and get captured which leads to ex-Titans Kid Flash and Superboy to rejoin the team. Following the mission, Cassie has shown that she has mixed feelings over her recently resurrected boyfriend Superboy. Upon their return from Dakota, Raven is abducted by Wyld once again and Cassie and the Titans travel into the Wyld's tainted dimension in order to save their teammate. The team works well together but are marred by bad luck as Aquagirl and Bombshell are overwhelmed and lost in the dark depths of the ocean. While other members of Cassie's Titans also leave the team following this mission for different reasons, Wonder Girl decides that she cannot lead heroes who she does not feel comfortable leading.
Following this decision, Wonder Girl invites Ravager to rejoin the team, which Rose surprisingly agrees to. Seeming to begin anew, Wonder Girl has developed a professional attitude while leading the team. This rubs Superboy the wrong way and their relationship continues to be strained. Batman (Dick Grayson) arrives at the Tower and requests that Robin (Damian Wayne) be put onto the team despite not being a teenager. Wonder Girl accepts this new Robin and the team does battle with new villains Dr. Caligan, Headcase, and the Feral Boys.
Wonder Girl recently starred in her own one-shot title, released in 2011. While visiting her mother at an architectural conference in London, Wonder Girl met a teenage girl of Indian descent named Kiran. After a brief but friendly conversation, Kiran revealed herself to be the super-heroine called Solstice. Wonder Girl and Solstice teamed up to do battle against villain Lady Zand, a tyrannical ruler of Zandia that was searching for lost artifacts from her country. The duo worked well together despite Lady Zand escaping. Following this battle, Cassie seemed to mend her relationship with her mother, which had grown cold since Cassie had taken over leadership of the Teen Titans.
Cassie has also over the same time frame appeared as a supporting character in the Wonder Woman title. She is usually called upon when Diana needs additional firepower (such as against Circe) or when the Amazons have needed to stand united against a threat (such as against Genocide). Her lack of confidence in her actions has occasionally been used against her by such villains as Devastation.
Red Robin (Tim Drake) decides to reclaim his place amongst the Teen Titans and the band is back together. Wonder Girl immediately relieves herself of leadership and allows Red Robin to take the reigns once more. Superboy and Cassie are officially broken up and the team responds to a missing persons report from Cassie's mother, Dr. Helena Sandsmark. Once they arrive, the Titans find themselves in battle with Hindu demons. But with Solstice as their ally, the Titans may have a shot at defeating them. This story is ongoing.
