Alexis Douse

Son of the late archduke of the Fantasia Union. An idealist and romanticist, he was to marry Marrine Kreische until a Chaos crashed the wedding and killed both of their fathers. While he is deeply in love with Marrine and wishes to marry her, the disaster at their wedding and the political bickering had made it all but impossible to reach out to her.

(Source: Grancrest Senki Wiki)