He's twenty-eight years old and acts as the Captain of the Silvana. In the series, he is portrayed as emotionally distant from the other characters, including his first officer, who resembles his deceased fiancée Euris Bassianus. Alex's actions are driven by one purpose, which is to kill Guild Maestro Delphine Eraclea, whom he holds responsible for his fiancée's death. After being confronted about his past, Alex reveals himself to be a friend of the legendary vanship duo of Hamilcar Valca and Georges Head, as well as the former owner of Claus's and Lavie's vanship.

Source:Wikipedia