Butch's breed is unknown. Whilst relaxing in the sewers, he hears something before his human owners do and starts to bark, much to their annoyance. He goes to investigate the sound, leaving his owners vulnerable to Facehugger and WarriorXenomorph attacks. He is never seen again, but is presumably deceased.
Butch appears to be a heavily blackened German Shepherd.
Butch is never given a gender indicating pronoun, however the masculine name hints at a masculine sex.