Father: Karstedt
　 Mother: Elvira (Karstedt's first wife, mother of baptism)
　 Older brother: Eckhart
　 Older brother: Lamprecht
　　　 Nephew: Siegrecht
　 Older brother: Cornelius

　 Younger half-brother: Nikolaus (son of Karstedt's second wife)

　 Mother: Rozemary (Karstedt's third wife, mother setting)

　 Adoptive father: Sylvester
　 Adoptive mother: Florencia
　 Older brother: Wilfried
　 Younger sister: Charlotte
　 Younger brother: Melchior

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

Status
　 Class: archnoble → archducal family member
　 Occupation: apprentice blue shrine maiden, orphan director and studio manager → archduke candidate, high bishop, orphan director and studio manager

Age related
　 Age difference with Myne: -1
　 Birth season: summer

Rozemyne is an archnoble girl. Her flowing midnight-blue hair is well kept, silkier than even the hair of most archnoble girls, and her moon-like golden-yellow eyes are like windows into her emotional heart. She has a pretty face as well, and would no doubt grow up to be a true beauty. She has pale white skin largely untouched by the sun, and soft hands that weren't at all worn down by labor.

Rozemyne ​​has a massive amount of mana inside her. Her mana is so great that Karstedt determined that it was necessary to hide his own daughter and raise her in secret, away from any danger. The former High Bishop misunderstood her presence in the temple, and not discerning her true identity, he began to groan and complain that a commoner shrine maiden disturbed the peace.

Rozemyne ​​was raised humbly, unaware of her parents or their status, but still, her compassionate heart ached for the suffering of those who lived in worse circumstances than her. She felt sorry for the children who lived in the orphanage, and did what no one else would by giving them food and work, due to that, Rozemyne is worshiped and honored by the orphans as a Saint.

The Archduke determined that the work Rozemyne gave to the orphans could become a new industry for his duchy. Just when he was considering spending the next twenty or more years spreading it around the duchy, Rozemyne ​​was targeted by a noble from another duchy.

In order to secure Rozemyne's position in the nobility, and to protect her mana wealth for the sake of Ehrenfest, the Archduke adopted her.