Charles zi Britannia

Charles Zi Britannia (シャルル・ジ・ブリタニア, Sharuru Ji Buritania), known as Charles di Britannia in the English subbed), is the 98th emperor of the Holy Britannian Empire, the father of Lelouch vi Britannia (and many others) and V.V.'s twin brother. He had a Geass power that allowed him to suppress and alter the memories of those he achieved eye contact with but lost this power in exchange for V.V.'s Code which granted him immortality. He served as the main antagonist in both of the series.