Sandorion de la Vallière

Duke Sandorion de la Vallière (サンドリオン・ド・ラ・ヴァリエール, Sandorion do ra Variēru) is the husband of Karin de la Vallière and the father of Éléonore de la Vallière, Cattleya de la Fontaine, and Louise de la Vallière.

Background
Little is known about the Duke's past, but he is a powerful mage, though his wife is more powerful than him.