Nagisa Chiba

Chiba Nagisa, 29 years old (30 at R2), is the sole female member of the Four Holy Swords and holds a strong attraction to Kyoshiro Tohdoh. A year after the Black Rebellion, she harbors animosity towards Zero for abandoning them. She survives the final battle but is captured along with all the other Black Knights for a public execution. She is released when Lelouch is killed and is seen together with Tohdoh in traditional Japanese attire in a photo of Kaname Ohgi's wedding.

First Season
Chiba makes her first appearance along with Kyoshiro Tohdoh and the Four Holy Swords to defend the Japan Liberation Front from Britannian Army. She is piloting a Burai Kai, an upgraded version of the Burai. While defending, Zero retreats leaving Tohdoh and the Four Holy Swords to fend by themselves. As a result, they abandoned their knightmares and escape. She is later seen with Tohdoh and the others for a meeting, but are discovered and Tohdoh sacrifices himself and becomes captured to let Chiba, Urabe, Asahina and Senba escape. Then, the Four Holy Swords turn to the Order of the Black Knights for help to rescue Tohdoh.

Chiba and the Four Holy Swords are given the Gekka to pilot by Rakshata. They break into the prison and rescue Tohdoh. Then, Chiba fights against Suzaku with Tohdoh and the others. Tohdoh and the Four Holy Swords knightmares take damage due to the Lancelot's Harken Boosters. They spot reinforcements and Tohdoh gives the command to release the chaffsmoke and escape.

She is seen later on after Euphemia massacres the Japanese due to Lelouch's Geass and follows under Tohdoh during the Assault on Tokyo Settlement. She appears with Tohdoh and strategizes on what to do next. During the time that Zero has left, she is pinned down with Asahina by Britannian Forces.

Second Season
After the failed rebellion, Chiba was arrested along with the other members of the Black Knights. To draw out Zero,Gilbert G.P. Guilford threatens to publicly execute all of the Black Knights. However, Zero does come, but manages to free them all. Because of Zero's earlier abandonment, Chiba has a harder time to trust Zero, but because of Tohdoh still follows under his command. She is later seen during the assault on a Britannian aerial transport of Viceroy Nunnally to kidnap her. She witnesses when Kallen falls off the airship and tells her to pull the ejection seat. Following that, Chiba is caught by the Mordred and ejects right before her Gekka is destroyed. During the time when the Black Knights are in the Chinese Federation, Chiba obtains the knightmare, Akatsuki Command Model Zikisan to replace her Gekka and to fight against the Chinese Federation forces with it. Before the meeting of the U.F.N., everybody is preparing. Chiba is seen putting on make-up for Tohdoh and was on her way to ask Tohdoh a question hinting on how their relationship is, but Ohgi arrives and Tohdoh leaves while Chiba states that she was to slow. After learning the truth of Zero's identity and his geass power, she joins the other leaders of the Black Knights and betray Zero.

She along with the Black Knights join Schneizel to stop Lelouch's plan. During Tohdoh's battle with Suzaku, his Zangetsu is destroyed, but managed to eject. The cockpit is caught by Chiba while defending for Tohdoh. Tohdoh attempts to join the fight again even though he is badly wounded and Chiba pleads him against doing so. Chiba witnesses Lelouch being assassinated by Suzaku. Chiba is last seen together with Tohdoh while wearing traditional Japanese attire in a photo of Kaname Ohgi's wedding with Villetta Nu.