Cornelius

Family structure
　Father: Karstedt
　 Mother: Elvira (father's first wife)
　 Older brother: Eckhart
　 Older brother: Lamprecht
　 Younger sister: Rozemyne

　 Younger half-brother: Nikolaus

　 Paternal relatives
　 Great-grandfather: Aub Ehrenfest (fifth generation)
　 Great-grandfather: former Giebe Leisegang (Bonifatius's first wife's father)
　 Grandfather: Bonifatius
　 Uncle: Karstedt's half-brother
　　　 Cousin: Traugott

　 Maternal relatives
　 Grandfather: former Giebe Haldenzel
　 Uncle: Claudio

Status
　Class: archnoble
　 Occupation: apprentice knight → knight / Rozemyne's aide

Age related
　Grade difference with Rozemyne: +4
　 Age difference from Rozemyne: +4 (summer)
　 Birth season: spring

He is Rozemyne's apprentice knight at service. He has bright green like young leaves hair and black eyes.