Charao is a male supporting character from the high school setting of the series. His name is derived from the Japanese word charai, which refers to a person who is flashy or superficial, and this serves as the foundation for his archetype within the story. He is a high school student with a distinct and trendy appearance, characterized by his blonde or yellow hair, which is cut to ear-length, and his bright green eyes. A notable feature of his look is that he has pierced ears, adding to his stylish image. He is typically seen wearing the standard school uniform.

In terms of personality, Charao is portrayed as being particularly open-minded and confident. He carries himself like a popular student and seems to enjoy being the center of attention. This is reflected in his hobbies, as he is a member of the school's music club where he acts as both a singer and a bassist. True to his flashy reputation, he is not shy about engaging in conversations about girls and relationships. He often appears alongside his two male friends, Supoo and Otao, and together they represent the boys' perspective within the narrative. In these interactions, the trio is frequently depicted as being thick-headed when it comes to understanding the opposite sex, often jumping to conclusions or making blunt observations that generate humorous moments.

Charao’s primary role in the story is to serve as a counterpart to the main female trio, particularly Galko. He is a classmate of the main characters, and his interactions with them are based on observation and teasing rather than deep personal friendship. One of his most notable functions is in the recurring discussions about the physical attributes of the girls in their class. In a specific instance, Charao, along with Supoo and Otao, engages in a heated debate about which female classmate has the largest chest. Charao argues in favor of Galko due to her noticeable figure, demonstrating how the boys often view the girls through a lens of physical curiosity. Despite his flashy demeanor and tendency to tease, he is not portrayed as malicious. Instead, his character is used to explore the awkwardness, misunderstandings, and genuine curiosity that surround teenage conversations about the body and relationships. Charao does not undergo significant personal development over the course of the series, remaining a consistent source of the boys' perspective and contributing to the show's lighthearted and candid tone.