Fran (フラン Furan) is an orphan who works as a grey-robed priest in the church.
Fran is a dedicated and disciplined young man who is wholeheartedly dedicated to the church and the Head Priest.
Before becoming one of Ferdinand's attendants, Fran was an attendant of the previous director of the orphanage, sister Margaret, alongside Arno. Sister Margaret used her position to exploit Fran sexually in her secret room, which gave him trauma; the reveal of her having had sex with a grey robed priest was considered scandalous enough in noble society that she committed suicide.
Arno, who became Ferdinand's new head attendant once Fran became Main's, held out continuing animosity toward Fran because of feelings he had for sister Margaret that went un-reciprocated due to her illicit contact with Fran, and therefore he felt Fran was responsible for her death.
Fran later served Ferdinand as his head attendant.
Initially, he resented the role, believing that it meant Ferdinand no longer trusted him; later, during a meeting with Benno, he learned that in actuality Ferdinand did so because he was the most trustworthy attendant Ferdinand had. Although he never shirked on his duties before that, finding out how strong Ferdinand's trust in him was made him thoroughly recommit to serving Main.
When Main "died" and became Rosemain, he immediately transitioned into becoming her head attendant, and ensured that all the other attendants treated Rosemain as a proper noble.