8 is an artificially intelligent computer found by Lowe on a drifting spacecraft and named for the only visible writing on its casing. However, it is not a quantum computer like most of the computers are in the CE era, as it identifies itself as a support operation system. It serves as a co-pilot for Lowe Guele's Astray Red Frame and later Jess Rabble's Astray Out Frame. Jess later returns 8 to Lowe.
8 has the ability to pilot any mobile suit it comes upon. It argues with Lowe about how to upgrade mobile suits and often engage in friendly banter with him. Usually, 8 helps Lowe out during combat by giving suggestions on what decisions are best for him. 8 also warns him when he has a chance of dying. It communicates with people through the words displayed on its screen, and can express its feelings or mood by varying the way the words are shown.
- In the promotional video for Gundam Seed Astray and several video games, 8 is given a voice. However, this contradicts its depiction in the manga, where it can only communicate through text.