Reyes' main job is to handle the communications for Camp Forlorn Hope. She is officially the communications officer for the besieged post but also is the de facto head of communications (mainly radio) security. This entails compiling the reports received from the Rangers at Camp Golf as well as their brass at Camp McCarran. Unofficially, she is also in charge of radio security, a responsibility she assigned to herself when she realized no one else seemed to care. Not just the radio security in the camp however, rather she is in charge of all the radio security over the ranger stations.
Her job however mostly contains the delightful task of tabulating stockpiles, kill ratios, mission success rates, radiation deaths, and other truly fascinating numbers. Despite being the only one in camp headquarters so dedicated to communications work, Reyes shows considerable initiative, dedication, and intelligence. While performing her duty however she has come across numerous inconsistencies between the numbers and the reports - especially with regards to intercepting hostiles (like the Legion possessing trained deathclaws). Wondering that the codes were compromised, she tried to receive permission to authorize her recent update - or at the least get field clearance to leave the camp and do it herself. This however was not taken seriously by any of the officers or troopers in the camp. They believe her to just be an incompetent desk jockey – due to her alcoholism – trying to glamorize the importance of her job, leaving her concerned, annoyed and underappreciated.
This is not the case, with less than a third of reported enemy sightings are getting intercepted. She worked out that either their intelligence is faulty, or NCR's enemies are one step ahead of them. She plans to verify the security of radio communications with the Ranger stations, asking the first new face she sees to help. She figures it's worth the risk, as the encryption they need for the job is unique to Ranger radios at each station and would be useless outside of them.
The Courier will have to head to each Ranger station to confirm the reports, allowing Reyes to pin-point the origin of the interference affecting the Republic's war effort.
After one finishes the quest "Return to Sender," they can inform Reyes about what happened. If one selects the dialogue option, "Forget about it. It's over." She will respond by saying, "Oh, well thanks for helping us get to the bottom of this, I guess." She will not say this vocally, as the audio file is missing.
"We've received some disturbing reports from some of the Ranger stations - heavy casualties at Alpha, Super Mutant Legionaries at Delta. The weirdest one has to be the Great Khans and their trained Deathclaws at Foxtrot. These reports can't be accurate. Can they?"
A number of interactions between the player and Reyes were cut prior to the release of the game. Of the more interesting options which were cut, a partially removed dialogue option exists where the Courier can tell Reyes "But I already got a tattoo with your name on it. Want to see it?" The circumstances which would have led to the Courier saying this to Reyes are not explained.
Reyes also has several responses that are leftover from when Obsidian still considered post-ending gameplay, referring to the end result of the battle, for each of the end states.
↑ 1.01.1The Courier: "What do you do here?" Reyes: "I handle communications for Camp Forlorn Hope, compiling reports I've received from the Rangers at Camp Golf as well as the brass at McCarran. Unofficially, I'm also in charge of radio security. No one else seems to take it as seriously as I do." (Reyes's dialogue)
↑The Courier: "I'll help. Tell me what I need to do." Reyes: "This holotape contains the updated security codes for the Ranger Stations. Show it to the comm officers there. Once the new codes are in use, anyone still using the old codes will just hear static if they're listening in on our frequencies." (Reyes's dialogue)
↑The Courier: "What do you need help with?" Reyes: "I have the delightful task of tabulating stockpiles, kill ratios, mission success rates, radiation deaths, and other truly fascinating numbers. I've come across numerous inconsistencies between our numbers and our reports - especially with regards to intercepting hostiles. I'm wondering if our radio security codes have been compromised. I need someone to deliver security code upgrades to each of the Ranger stations." (Reyes's dialogue)
↑ 5.05.1The Courier: "You'd think the NCR would be very concerned about this sort of thing." Reyes: "I've been trying to get someone to authorize this update - or at the least get field clearance to leave the camp and do this myself. But nobody takes me seriously - they just think I'm an incompetent desk jockey trying to glamorize the importance of my job. Less than a third of reported enemy sightings are getting intercepted. Either our intel is faulty, or our enemies are one step ahead of us." (Reyes's dialogue)
↑Reyes: "Got a second, trooper? I've got something important that needs to get done, but nobody's stepping up to help me out. I'm hoping you're different." (Reyes's dialogue)
↑Reyes: "Hey, you're not one of the troopers... got a second? I have work I need done and nobody here at the camp has the time or inclination to help me out." (Reyes's dialogue)
↑The Courier: "What makes you think you can trust me with security codes?" Reyes: "The security codes are unique to the radios at each Ranger station. They're useless anywhere else." (Reyes's dialogue)
↑The Courier: "What else did you need me to do?" Reyes: "We've received some disturbing reports from some of the Ranger stations - heavy casualties at Alpha, Super Mutant Legionaries at Delta. The weirdest one has to be the Great Khans and their trained Deathclaws at Foxtrot. These reports can't be accurate. Can they? I know you've already been out there, but could you do me a solid and confirm these reports with the Rangers who sent them in?" (Reyes's dialogue)