Ferdinand フェルディナンド
Family structure
Spoiler　Father: Adelbert (deceased) 　 Mother: Seradina 　 Older half-sister: Georgine 　　　 Niece: Alstede 　　　 Nephew: Wolfram (deceased) 　　　 Niece: Detlinde 　 Older half-sister: Constanze 　　　 Nephew: Rudiger 　 Older half-brother: Sylvester 　　　 Nephew: Wilfried 　　　 Niece: Charlotte 　　　 Nephew: Melchior 　　　 Niece: fourth child 　 Paternal relatives 　 Uncle: Bonifatius 　　　 Cousin: Karstedt 　　　 Cousin: Karstedt's half-brother 　 Half-aunt: Irmhilde
Age related
Spoiler　Age difference with Myne: +13 (summer) 　 Birth season: presumed to be spring or summer

He is a blue priest who serves as the High Priest of the temple of the city of Ehrenfest. He is tall and slender, he has light blue hair that reaches down towards his shoulders and pale golden eyes. People frequently mistake him by being older than he really is.
SpoilerHe was the son of a concubine in noble society. Regardless of his father’s true wife, his relationship with his older half-brother was not at all bad. After his father's death, his half-brother recommended him to join the temple. Before he became the High Priest, with the help of his half-brother he built a library inside the temple, one that even nobles with unfortunate economic circumstances would be able to use. Despite the fact that it had not been terribly long since he joined the temple and that he was still very young, he became the High Priest due to all of the people who were primarily in charge of managing the temple’s affairs had been called away to noble society, leaving him to take on every single aspect of running the temple.