>>314038629
unfortunately your only options are the most generic unity robot or some little green robed thing

if you're not hellbent on keeping unity from being installed on your computer, you can just grab a free model from booth and get it set up in 20 minutes
here's a few good ones:
https://sasaminvrc.booth.pm/items/1820903
https://booth.pm/en/items/1190663
https://booth.pm/en/items/2072933
https://booth.pm/en/items/1381874
https://booth.pm/en/items/1612769
https://booth.pm/en/items/1694770