Isaac is a British spy who works undercover in Kuchen. Since Kuchen insisted on remaining neutral, despite the time and era being just between two world wars, the British government wants to know if Kuchen can be influenced (by force if necessary) to support their side. So Isaac is sent, and for nearly a year he works in Kuchen in the disguise of an author, though he is not the only secret agent who works undercover in Kuchen.    Isaac actually received the title &ldquo;Sir&rdquo; for his service to his country. His parents were fallen noblemen that, due to poverty, were thrown out of their manor, something that affected his sister very much. He has three younger siblings, a sister names Rosa and two younger brothers. At some point after they were thrown out of their manor Isaac was left to take care of his younger siblings and was separated from his parents. He joined the army to earn money and support the family during World War I (he calls that time &ldquo;hell&rdquo;), and due to his outstanding conduct in battle was recruited to the secret services.    Isaac has a motorcycle and usually carries with him a revolver. Also, he seems to have strange connections with some of the alumni of Rosenstolz academy.     __Source:__ Wikipedia

The first season begins with introducing the characters, their past and their ambitions. Orpherus, Eduard, Camus, Lui and Naoji are five noblemen who attend the prestigious Rozenstolz academy, and who are a part of the Strahl class &ndash; a class for potential candidates for the advisory positions in the royal palace in the small European country of Kuchen. Isaac is an English writer who visits Kuchen. While still students, the five noblemen are forced to deal with corrupted politicians, secret agents, attempted murder and ambitious individuals from both inside and outside of school who threatens to break the fragile peace in their country, and even assassinate the king.

[Blog](http://koyap.jugem.jp/) | [Agency Profile](https://tsf-official.com/talent/takehito-koyasu/)

Koyasu is the most prolific voice actor in the industry, having been credited for over 700 roles as of April 2022.

Growing up, Koyasu skipped out on going to school to watch movies at home because he wanted to become an actor. It wasn’t until later that he became interested in voice acting after having seen [Galaxy Express 999](https://anilist.co/anime/1491/). After graduation he entered a voice acting school. In 1988, he made his voice acting debut, and got his first regular role a year later voicing [Gai](https://anilist.co/character/13374/) in [Tenkuu Senki Shurato](https://anilist.co/anime/2113/).

Though having voiced more characters in the medium than anyone else, he is probably most known for his role as [Dio Brando](https://anilist.co/character/4004/) in [JoJo’s Bizarre Adventure](https://anilist.co/anime/14719/). He has stated that he likes playing villainous characters.

Koyasu has taken over many of [Kaneto Shiozawa](https://anilist.co/staff/95424/)’s roles after Shiozawa’s passing.

Father of [Kouki Koyasu](https://anilist.co/staff/219102/).

__Non-Anime Roles:__

- Olivert Reise Arnor - The Legend of Heroes Series (VG)
- More - Metaphor: ReFantazio (VG)
- Mustang - Goddess of Victory: Nikke (VG)

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The Strahl candidates are enjoying a brief holiday in their various homes. However, many surprises await them when they finally come back to their elite boarding school: Rosenstolz Academy. There is a new headmaster, and his policies are not necessarily to the advantage of the main characters. <br><br>
(Source: Wikipedia)

Sir Isaac Cavendish