B6-21

B6-21 is a synth mentioned.

Background
B6-21 works for the Institute, and was formerly stationed at Site Alpha as a member of group G3376. They, alongside H7-44, and K0-84, were recalled, leaving C8-65 as the sole member of group G3376 left at Site Alpha.

Appearances
B6-21 is mentioned only in Fallout 4.