Rolo Lamperouge ロロ・ランペルージ

Rolo is introduced in the second season as Lelouch's younger brother,

Rolo is unsociable and reserved, unlike his older brother, a trait which does not gain him many friends at school. He often stays in the background and simply listens and isn't afraid to be very blunt about their faults. Lelouch's year without memories show him and Rolo quite happy, particularly when Lelouch gives him a heart-shaped musical locket as a birthday present, which he keeps attached to his cellphone. His attachment to the locket is such that he refuses to return it even when Lelouch tries to reclaim it.