Genbu Kururugi (枢木 ゲンブ Kururugi Genbu) is Suzaku's late father, the last Prime Minister of Japan, and host for both Lelouch and Nunnally Lamperouge during their exile as political hostages seven years prior to the start of the series. When Britannia began its invasion of Japan, Genbu refused to surrender, preferring unending resistance against Britannia.

In Suzaku of the Counterattack,

In the Nightmare of Nunnally

(Source: Wikipedia)