As an Initiate in the Order, Rachel was assigned to Olivia Rivers to be mentored. Her first assigned field mission was to raid the Garrahan Outpost with Olivia. However, the latter went on to drag Rachel on a further unsanctioned raid of multiple sniper nests, beast dens and a derelict military bunker before reporting back to base, leaving Rachel incredibly shaken. Despite the harrowing first mission, Rachel rose in the ranks to become a Seeker.
After Olivia Rivers began selling out the Order of Mysteries to the Cutthroats, Rachel was caught in one of the planned ambushes and barely escaped with her life. She was the one to finally discover Olivia's betrayal and was in the midst of telling Eve Devoir about her discovery when Olivia walked in on them. Rachel was killed by Olivia in the resultant confrontation.
Rachel West is mentioned only in Fallout 76.
- Cryptos terminal entries; The Order of Mysteries Handbook, Membership Roster
- Riverside Manor terminal entries; Headmistress' terminal, 9/8/84: "For the most part, this week's missions have gone well. The exception, as usual, was Olivia. Her raid against the Garrahan Outpost was flawless, but rather than report back, she went on to clear four sniper nests, a half-dozen beast dens, and a derelict military bunker before finally returning three days late. And she dragged her Initiate along for the ride. It was Rachel's first time in the field. Poor girl is still shaking."
- Riverside Manor terminal entries; Headmistress' terminal, 11/10/86: "Three more girls are confirmed dead. Evelyn and Catherine are unaccounted for. Rachel barely escaped. And that's just in the past week."
- Riverside Manor terminal entries; Headmistress' terminal, From Olivia: "Two months ago, I copied Cryptos, handed it over to the raiders. Rachel finally caught on. She was telling Eve when I came in tonight. At that point, well, it was them or me. So I killed them. I killed them all."