I literally did that one winter when I lived in a small studio and I had a particularly fancy salvaged HP workstation. It was great!
(Except I was missing an apparently important fan and most of my RAM went bad, 96G out of 128. Make sure your system cooling works correctly before trying this!)











Gloop and gleep, heck yeah! Nearly invincible and can turn in to anything.
I’d go with Blip (the monkey), since I’m quiet aside from occasional chirps.