Becca Collins is a member of The Grange Enclave, along with Quentin Barnes, Jack Ferris and Bob Macklin. She is bossy and has little patience for the others in her enclave; she was seen criticizing Jack Ferris for wandering too far for supply, leading to two more members having to search for him, leaving the enclave undefended.
Quentin Barnes: After a particularly harrowing supply run, he and Becca got drunk and had a one night stand. She didn't think much of it, but Quentin expressed a desire to pursue a relationship. The player's action (specifically, during the mission Bad Tidings) can determine the outcome of their relationship, as well as enclave's eventual fate.
Sheriff Carl: It can be guessed that Becca had a few run-ins with him back when she worked as a prostitute. Her hostility towards him can be attributed to him being a reminder of the past she is trying to forget. Sheriff Carl maintains that despite what she had done, Becca is "a good kid" and "deserves a clean slate".