Chartreuse belongs to the highest nobility of Dukes. He is the third quadruplet. He is now the highest priest in the kingdom of Montgarde. 

He is kind, solemn, and a harbinger of peace. He carries himself with humility and is quite mature. He is soft-spoken, formal, and is every bit of a gentleman.

He has green hair and green eyes. He wears glasses.

His lover, Madeleine, died a few years back due to an illness, hence why he became a priest as he would never love anyone else but her.