Kujou Hikaru / The Boy In The Mansion

Kujou Hikaru (九条ヒカル, Kujō Hikaru?) is the Evil King's life and in the epilogue he is introduced as Hikari's little brother, but for most of the series he is not named so he is usually referred to "The boy in the mansion" (館の少年, Yakata no Shōnen?).