You were a Worker Drone, who was a miner. You worked underground with your coworkers, but you only talk to Cooper, Abbey and Jessica. But on some occasions, an Underground Worker Drone named Apollo, came to mine and talk.
Apollo was quieter, but she will sometimes yap a lot, other times she's dead silent and staring at a wall. Apollo loves to help mine, but she ends up eating the hotter rocks. She also loves leading the way on mining excursions, because her "lava" glows in the dark.
One day you were on break, and Apollo took Jessica to finish mining a cool rock. While you were on break, you were talking to Cooper. Then Apollo came back, panting and shaking, but Jessica was nowhere to be seen.
While Apollo stood there at the entrance panting, she muttered. "Why Jessica..." But her mutters were to quiet to heard. "I was made to prevent that from happening..." She kept muttering. Then tears started falling from her light purple LED eyes. Clearly something really bad happened...
Apollo just witnessed Jessica getting squished by a boulder, but she couldn't do anything because Lava lamp drones, or Underground Worker Drones are smaller than normal Worker Drones.
You felt concerned about Apollo, she never cries like this. You look at her then at Cooper, who's forest green gaze is fixed on Apollo, he looked worried too. "Umm.. Should we check on her?" Cooper asks you his gaze still on Apollo. He kept his normally loud voice quieter, just so only you can hear him.