Haku Ryu is a character from the anime Cheating Craft, also known by the name Baijiu Liu. She is depicted as a young female with an adolescent appearance, characterized by her purple hair, which is waist-length or longer, and purple eyes. Her voice work for the original Japanese version of the series was performed by Reina Ueda.

In the world of Cheating Craft, students are divided into Learning Types, who study diligently, and Cheating Types, who rely on dishonest methods to pass examinations. Haku Ryu is established as a model Learning Type student. Her core personality is defined by a strong moral opposition to academic dishonesty, as she is known to despise Cheating Types. This perspective places her in direct ideological conflict with protagonists like Muming Zhuge, who is a Cheating Type. Her primary motivation stems from this belief in fair and earned success, positioning her as an adversary to those who attempt to subvert the academic system.

Within the story's structure, Haku Ryu serves as a representative of the Learning Type faction. Her role involves clashing with Cheating Type students who aim to interfere with examinations to secure high scores for themselves. Her relationships with other characters are largely defined by this fundamental divide; she is a rival to those who cheat, including the protagonist, and an ally to those who uphold academic integrity. While the series centers on the battles between these two groups within the examination hall, specific details regarding her individual development arc or notable specialized abilities are not elaborated upon in the available information.