Karin Ryuzaki is a character from the anime and light novel series A Misanthrope Teaches a Class for Demi-Humans. She is a dragon girl who belongs to a noble family of her kind, a background reflected in her regal bearing and physical features, which include long blonde hair, blue eyes, horns, and a tail.

Karin is introduced as one of three new students in the second volume of the light novel series. Her primary motivation for wanting to become human is distinctly personal and romantic: she has fallen in love with her teacher, Rei Hitoma, at first sight and seeks to understand the nature of love itself. Her aggressive pursuit of Hitoma's affection is a defining trait, and she is determined to confess her feelings to him despite the obvious social complications of a student-teacher relationship.

Her personality is defined by this forward and determined nature. Whenever she finds an opportunity, she actively tries to get closer to her teacher, making her a persistent presence in the classroom. This behavior contrasts with the more reserved or goal-oriented reasons of other demi-human students, as her desire to become human is largely driven by her wish to be with someone else. While her fellow students are focused on their own transformations, Karin's role in the story is tied to her romantic pursuit, which creates a unique dynamic within the group and with their misanthropic instructor.

Key relationships for Karin center almost entirely on Rei Hitoma. Her development is closely tied to this quest for love, as her aggressive advances are a catalyst for her personal growth and her interactions with the human world. Regarding her notable abilities, as a member of the dragon race, she likely possesses inherent physical traits associated with her species, but specific magical or combat abilities are not a primary focus of her character description in available sources.