Chiren is a cyberphysician from Zalem who is the former partner of [Daisuke Ido](https://anilist.co/character/6545/Ido-Daisuke) on Zalem. Unlike Ido, Chiren sees their existence in Scrap Iron City as far beneath them. She is desperate to return to Zalem and disgusted by Ido's acceptance of his fate. It is hinted that they used to be romantically involved, as Chiren carries a holocard of them together. 
(Source: Battle Angel Alita Wiki)

Doc Ido, a doctor and mechanic who lives and works in the hellish, postapocalyptic "Scrapyard", finds the&mdash;miraculously preserved&mdash;remains of a female cyborg in a junk heap. After he revives and rebuilds her, the preternaturally strong, amnesiac "Gally" begins to forge a life for herself in a world where every day can bring a fight for life. Adapts the first two volumes of the "Battle Angel Alita" manga.

Laura Chapman is an American voice actress working with ADV Films, known for her roles in the English-language dubs of anime series.    She is a gifted singer - a talent she's yet to be able to put on display in her voice-work - but her ability to hold a note for long periods of time earned her praise from peers and director Matt Greenfield in her part as Galatea in Bubblegum Crisis Tokyo 2040. Chapman's also jokingly self-deprecating about some of her past roles, as typically she's "the bitter woman who gets melted, put into specimen jars and blown up".    (source: Wikipedia)