Chiren is a main character from the cyberpunk OVA Battle Angel Alita. She was once a cyberphysician from the sub-orbital city of Zalem and former partner to Daisuke Ido. For unknown reasons, the two cyber-doctors were cast out of Zalem and were forced to work in Scrap Iron City located directly beneath their former home. While Ido has accepted his circumstances, Chiren is desperate to go back to Zalem, even if it means going against the law of the Factory.
Japanese Voice: Mami Koyama
English Voice (Manga UK dub): Tamsin Hollo
English Voice (ADV dub): Laura Chapman
Dissatisfied with working in Scrap Iron City, Chiren desperately wishes to return to Zalem and makes a deal with the crooked businessman Vector, agreeing to build and modify cyborgs for Coliseum fights. In exchange for this, as well as some occasional sex, Vector promises to arrange for Chiren to return to Zalem. As well as returning to Zalem, Chiren also wants to humiliate her former partner Ido for refusing to help her. An opportunity arises when the ex-gladiator and brain junkie Grewcica arrives at her apartment seeking help, having just been badly damaged by Ido's new cyborg Alita. Chiren decides to enhance Grewcica so that the both of them can have their revenge, outfitting him with new armour and supersonic cutting cables in his fingers. Despite these enhancements, Grewcica is still unable to defeat Alita and is destroyed during their duel on the Scrapyard.
Following Grewcica's death, Chiren begins to lose all confidence in her abilities. After discovering the number of bounties Alita has wracked up in her short time as a hunter-warrior, Vector decides he wants to sign Alita up for the Coliseum and orders Chiren to go out and find her. Chiren reluctantly obeys and follows Alita to a dilapidated warehouse where she meets with Yugo. While listening to Alita and Yugo talk about their dreams for the future, Chiren begins to question her own purpose, thinking back to the days when she and Ido worked together on Zalem.
A short time later, Yugo is mortally wounded by the hunter-warrior Gime. Alita kills Gime, but Yugo is quickly bleeding to death and Alita doesn't know how to help him. Chiren then approaches Alita and offers to help Yugo by connecting Alita's own life-support system to his head. This gives Alita time to get Yugo to Ido's surgery where Ido transplants Yugo's head onto a cyborg body. Afterwards, Chiren returns to Vector to tell him what's happened to Yugo and that she's done working for him. Before she walks out the door, Vector tells her that the time has come for her to go back to Zalem.
Chiren's death isn't shown on-screen, just the grisly aftermath. After learning about how Vector had manipulated Yugo, Ido pays a visit to Vector's office and beats him. While brutalising Vector, Ido spots one of Chiren's earrings on the floor and fears that Vector had done something to her. Ido demands to know where Chiren is and Vector points to a cloth on a nearby counter. Ido removes the cloth to reveal numerous glass tubes containing human organs - Chiren's organs. Vector had Chiren's body parts harvested in order to sell them off to Zalem which apparently thrives on the black market organ trade.