Very old oc i had, who is dead, but brought back alive by some creepy slime.
jumped off the autopsy table and ran out, probably scaring the shit out of whoever was working there XD
He keeps mostly to himself, and the slime usually rests inside his torso cavity, but can be brought out to be used as a weapon or a tool.

it has a bit of a mind off its own, and its own agenda.
it uses him as a means of getting around humans undetected.
usually with lots of complaining from said human XD

but they work together, he is happy he isnt dead anymore.