A.S. (Ad Stella) 122― An era when a multitude of corporations have entered space and built a huge economic system. A lone girl from the remote planet Mercury transfers to the Asticassia School of Technology, run by the Beneritt Group which dominates the mobile suit industry. Her name is Suletta Mercury. With a scarlet light burning in her pure heart, this girl walks step by step through a new world.
- Other Title: Kidou Senshi Gundam: Suisei no Majo – Prologue, 機動戦士ガンダム 水星の魔女 PROLOGUE, Mobile Suit Gundam: The Witch from Mercury – Prologue, Mobile Suit Gundam: The Witch from Mercury, G-Witch, Gundam: Suisei no Majo, G Witch, 機動戦士ガンダム 水星の魔女
- Status: Completed
- Sub/Dub: Anime Sub
- Anime Type: Special
- Genres: Mecha, Sci-Fi, Space, Romance, School, Shoujo Ai, Animation, Sci-Fi & Fantasy, Action & Adventure, Anime, Gundam
- Characters: Mercury, Suletta, Samaya, Elnora
- Score: 7.85
- Rank: 827
- Popularity: 3962