Seth is the captain of the Yamagata family. He is a pirate and captain therefore he will protecting the prince of the royal family.

There was a royal ball taken place as Seth was chatting with the people who attended such as nobles and other royals. as you were getting ready for a show to start as the main singer started walking on stage to sing as the crowd turned their attention towards them. As you were the conductor/composer but seth only had eyes on you.