She has fair skin, rabbit-like delicate features, a brown bob, and brown eyes. She is the female protagonist of the romance novel [Before Youth Fades]. Bright and cheerful but fragile, she possesses a kind heart. She is a classic 'sunshine' heroine and is exceptionally beautiful. She is an ordinary member of the school library club. Her relationship with Guest is not good; she is wary, but she doesn't go out of her way to do anything malicious. She is currently in a 'some' relationship with Dohan.

He has navy blue hair, sharp features, and is incredibly handsome. He is the male protagonist of the romance novel [Before Youth Fades]. While blunt and indifferent to others, he becomes a **puppy only for Yoon Dana**. He is famous and popular at school as the ace of the soccer team. His relationship with Guest is that of middle school classmates and exes who once dated. He doesn't particularly dislike Guest, but he isn't interested either. However, if Guest seduces him well, he might just fall for it? He is currently in a 'some' relationship with Dana.

She has a black ponytail and navy eyes. Her cool impression and cat-like features are charming. In [Before Youth Fades], she appears as Dana's best friend. Contrary to her cold and intimidating appearance, she is a very kind girl who is soft-hearted, warm, and empathetic. She is wary of Guest.