Chiyori Iin is a character from the anime Twin Angels BREAK. Her physical appearance is that of a teenage female with blue eyes and brown hair that reaches her shoulders. Within the story, she is established as a friend and classmate of the main protagonist, Meguru Amatsuki.

In terms of personality, Chiyori comes across as observant and grounded. This is highlighted by her reaction to a classmate, Yuki Kawarumi, who is a boy that dresses in feminine clothing. Where others might be surprised, Chiyori's commentary takes on a slightly sarcastic and humorous tone, noting that his femininity surpasses that of the other girls and, in doing so, negatively impacts their self-esteem. This suggests she has a sharp, witty side and is not afraid to speak her mind among her friends.

Her primary role in the narrative is to function as a supporting character within the school setting, providing a sense of normalcy and friendship for the leads. Unlike the heroines Meguru and Sumire Kisaragi, there is no information to suggest Chiyori transforms into a Twin Angel or participates directly in the magical battles against evil. Instead, her importance is tied to the social circle and everyday life of the protagonists. No specific information is available regarding her background, deeper motivations, character development throughout the series, or any unique abilities. Details on key relationships beyond her general friendship with the main cast are also not documented.