Family structure
　Father: Karstedt
　 Mother: Elvira (father's first wife)

　 First Wife: Heidemarie (deceased)
　　　 Child: died with mother at fetal stage

　 Younger brother: Lamprecht
　 Younger brother: Cornelius
　 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: Ferdinand's aide

Age and attribute related
　Age difference with Rozemyne (summer): +11
　 Grade difference from Rozemyne: +11
　 Birth season: spring or summer
　 Attribute: probably all attributes because he's dedicated to Ferdinand

He is Ferdinand's escort knight. He has dark green hair and blue eyes.