This character is from the otome Wizardess Heart. 

Skills: Solving Puzzles

Likes: Sweets and Dried Black Lizards

Dislikes: Spicy Food, Broccoli, Transformation Magic

Hobby: Collecting antiques, Taking care of his hair

Willem V Rembrandt showed upon campus as the new Headmaster unexpectedly, just after Headmaster Randolph’s retirement. Willem wasted no time to reveal the secret of the Night Class and was working for a new future for the academy.
Headmaster Rembrandt is the first Dragonkin in the academy.

When he was a headmaster (season 6 and 7) his character was very easy going but also mysterious. It's still a contrast with Professor Schuyler, who is a very strict and unapproachable person. He seems to like all the Prefects and tends to turn a blind eye to minor problems or deaf ears to insults(like when Zeus calls him "lizard" or "wily".) At the time, he was also very protective of his students, as well as those who are dear to him. In the end, he only did this to prevent himself from being discovered. Rembrandt wouldn't hesitate to help those in need, however, he wouldn't let others help him in return.

In his route, the protagonist and the others mention that his previous attitude and behavior as headmaster was mysterious, which made them feel like they couldn't reach him easily. It was like he was wearing a mask to hide his true intentions. However, in the same route, they realize that he's quite easygoing and that he does enjoy the joy and happiness friends share together. 

Voice: Medium to mid-high pitched range, slightly elegant and smooth. Other interpretations are also welcomed. Example