Nikolaus

Gender: Male   

Family structure
　Father: Karstedt
　 Mother: Trudeliede (father's second wife)

　 Older half-brother: Eckhart
　 Older half-brother: Lamprecht
　 Older half-brother: Cornelius
　 Older half-sister: Rozemyne

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

Age related
　Grade difference with Rozemyne: -3
　 Birth season: other than winter

He has bright maroon hair and light blue eyes.