Abel Remno
About
He is the second prince from the Kingdom of Remno and a student at Saint-Noel Academy. Mia sets her sights on getting closer to him to allow herself to flee to Remno when the revolution army comes for her.
It is revealed thanks to his future granddaughter, Miabel, traveling to the past, Abel eventually ends up marrying Mia.
(Source: Tearmoon Empire Wiki)