Chameleon (comics)
The Chameleon was born a Soviet citizen named Dmitri Smerdyakov (Дмитрий Смердяков). In his youth, he was a servant and half-brother to Sergei Kravinoff and eventually became a minor associate to Gustav Fiers. Although Dmitri and Sergei were friends, Sergei was often abusive to Smerdyakov, leading to a combination of admiration and resentment towards Kravinoff. Eventually, Smerdyakov emigrated to the United States of America. As he had made a talent for himself during his youth, impressing his brother by impersonating friends and neighbors, he assumed an even more impressive disguise: the identity of Chameleon. During his first known criminal outing, he impersonated Spider-Man, though he was exposed and arrested. Shortly afterward, Kraven the Hunter himself came to America, and the Chameleon set his old associate's sights on Spider-Man. Both men became long-time enemies of Spider-Man, part of his primary rogues' gallery.
Kallen Stadtfeld
When Lelouch takes the U.F.N. leaders hostage, Kallen insists that she'll take Lelouch down personally, as she possesses the only Knightmare capable of fighting Suzaku's "Lancelot Albion". However, Xingke orders her not to fight, fearing for the safety of the hostages. After the Black Knights side with Schneizel, Kallen is stationed in the front lines. She breaks away from the main line to try to reach Lelouch, but is called back. Kallen breaks into the "Avalon" and attempts to kill Lelouch, with tears in her eyes as she does so, but is stopped by C.C. Kallen defeats C.C. and, with the help of Gino, proceeds to the "Damocles" for a final confrontation with Suzaku.