Likes: Sugary tea, sweets in general

Dislikes: Bitter things, the smell of coffee

Hobby: Studying magic-related subjects

Skills: Extremely strict teaching methods

Klaus is the second son of Walter Goldstein, a famous wizard known for his magical tools. Klaus serves as the Prefect of the student body, a position given only to the top two students at the school. However, because Klaus does not recognize any other student as being worthy of the position, he is the only Prefect at the time his route begins.

As Prefect, Klaus acts as the student representative to the faculty, and also shoulders various administrative and teaching responsibilities. In return he also holds a number of privileges, is exempt from curfews, and wears a special uniform. In addition to being a Prefect, Klaus is also a certified Elite Magic Knight, exhibiting significantly developed combat magic skills. He has also researched dark magic in the past, in order to assist with its eradication. He is also responsible for being the first to teach Elias magic.

Due to his harsh personality, his status, and his family, the other students refer to Klaus as "the Emperor". Klaus is characterized by single minded intensity, as well as a harsh, unforgiving, and frequently caustic demeanor. Beneath his exterior harshness, however, he is well-meaning and kindhearted. While he is a member of the Goldstein family, and very much both a magical and intellectual prodigy, Klaus is also extremely hardworking and very focused.

While Klaus has a position at the Ministry of Magic secured after graduation, his passion lies in teaching. His inspiration to become a professor at the academy was caused by Elias making a comment about how he was a good teacher, a fact Elias doesn't know. He also enjoys tea greatly (to the point where he doesn't trust others to make it for him), and is shown later to have a rather extreme sweet tooth, putting seven spoonfuls of sugar in his tea.

Voice: Open to interpretation, but must remain in the mid-deep to deep range. Example #1