Chen is a significant supporting character in Jyu-Oh-Sei, where she holds the position of Top within the Sun Ring. As a native of the planet Chimera, she is not a prisoner sent to the planet but rather one of its born inhabitants, which makes her deeply familiar with its harsh laws and brutal social structure. Physically, she is depicted as a young woman with short black hair and blue eyes, often seen wearing a headband and a necklace, and she typically carries a sword as her primary weapon. Her attire and the way she is framed in the story place a notable emphasis on her legs, making her physical form a recurring visual motif, particularly in the first half of the narrative.

As the leader of the Sun Ring's female clan, Chen is an outstanding and formidable fighter, respected by her peers for her strength and combat prowess. Her personality is that of a strong and fierce warrior, yet she is not without her vulnerabilities; she is a powerful woman who is also deeply driven by her personal emotions. Her most defining characteristic is her unrequited love for the mysterious character known only as Third. She is irrevocably in love with him, a fact that shapes many of her decisions, even though he had rejected her before the events of the story began. This romantic attachment makes her susceptible to manipulation and adds a layer of personal tragedy to her role as a leader.

Chen's primary motivation throughout the series is intertwined with her feelings for Third and her duty to her ring. She is one of the most courted women on the planet, with other leaders, such as the chief of the Ochre Ring, hoping to win her favor. Her role in the plot often involves her authority as the Top of the Sun Ring. Early in the story, she approaches the Ochre Ring with the intention of retrieving Tiz, who is the Second of the Sun Ring's female group and has left with the protagonist, Thor. This action sets her in direct opposition to Thor and his companions initially.

Key relationships define her trajectory. Her relationship with Third is the most critical; her love for him makes her a pawn in his larger schemes. Her dynamic with Tiz is also notable, as she is the superior to the young woman who becomes an ally to Thor. Regarding the protagonist Thor, her stance evolves over time due to her connection to Third, as Third takes an interest in helping Thor survive and rise to power. Chen’s development is marked by a significant injury that occurs during the story's time skip; she suffers a wound that is made all the more unpleasant for the audience because of the earlier visual focus on her legs. This injury likely impacts her role and physical capabilities in the latter part of the series, forcing her to adapt from her previous position as an active front-line warrior. Her notable abilities rest in her skill as a sword fighter and her physical strength, which allowed her to rise to the position of Top in a deadly environment where only the strong survive.