|Relatives||Ian Welch (brother)|
|Appearances||Uncharted: The Fourth Labyrinth|
Gretchen Welch is a character that appears in the 2011 novel Uncharted: The Fourth Labyrinth.
In the novel, she is a graduate student working with Dr. Maynard Cheney at the Museum of Natural History. When Jadranka "Jada" Hzujak, the daughter of a recently-murdered colleague of Dr. Cheney, arrives the Museum, Gretchen explains the research Dr. Cheney and Jada's father Luka were carrying out.
Gretchen Welch is an attractive young woman, who wears her hair up in a loose bun. Gretchen is a graduate student working with Dr. Maynard Cheney on an exhibition at the Museum of Natural History called "Labyrinths of the Ancient World". She has a brother named Ian, and it is implied she is in a romantic relationship with Dr. Cheney.
 Uncharted: The Fourth Labyrinth
In October, treasure-hunter Nathan "Nate" Drake, antique-dealer Victor "Sully" Sullivan and Jadranka "Jada Hzujak come to the Museum of Natural History in search of Dr. Cheney, as he was working alongside Jada's father Luka before Luka was murdered. Gretchen fetches Nate, Sully and Jada to Dr. Cheney's office through the "Labyrinths of the Ancient World" exhibit, but as they approach Dr. Cheney's office, a ruckus breaks out in the office.
Gretchen and the visitors rush to the office, where they find Dr. Cheney dying, having been murdered by a member of the Protectors of the Hidden Word, a secret society set up to guard the mysteries held within labyrinths around the world. Nate gives chase to the murderer but is unsuccessful in catching him, and Gretchen calls the Museum's security team.
In the office, Gretchen shares details with Nate, Sully and Jada of the work carried out by Dr. Cheney and Luka. She then reveals that her brother Ian is a manager at the excavation site of a labyrinth in Egypt that Dr. Cheney and Luka researched during their project. Gretchen promises to contact her brother and get Nate, Sully and Jada access to the excavation site, and her visitors leave before the police arrive at the murder scene.
- Uncharted: The Fourth Labyrinth (novel) (2011)