X4-72 is a Synth working in the Institute in Fallout 4.[1] Appearances[edit] X4-72 is mentioned in Fallout 4. References[edit] ↑ The Institute Terminal Entries; Robotics terminal, Maintenance Requests Categories: Fallout 4 mentioned-only synth charactersInstitute charactersSynth Retention Bureau membersInstitute Facilities members
