Genbu Kururugi

Genbu Kururugi (枢木 ゲンブ) is Suzaku's late father, the last prime minister of Japan, and host for both Lelouch and Nunnally Lamperouge seven years prior to the series.

Character History
When Britannia began its invasion of Japan, Genbu refused to surrender, preferring unending resistance against Britannia. It was reported in the media that Genbu Kururugi had committed suicide in order to stop the all-out war against Britannia. In the immediate aftermath of the incident, the truth behind Genbu's death was covered up. However, it is later revealed by Mao using his Geass on Suzaku, that he was actually murdered by his own son.

Nightmare of Nunnally
In the Nightmare of Nunnally, Genbu Kururugi was killed by C.C..

Suzaku of the Counterattack
In Suzaku of the Counterattack, when Suzaku hears him talking to the Britannian emperor selling out Japan, he kills him.

Trivia

 * Both Genbu Kururugi and his son, Suzaku, have the same names of two of the Four Symbols in the Chinese constellation; Genbu being the Black Tortoise of the North and Suzaku being the Vermillion Bird of the South.