He's got ACID BLOOD
and ACID PUKE
and he HATES USING BOTH BECAUSE THEY REQUIRE BLEEDING AND PUKING, RESPECTIVELY,
which are each VERY UNCOMFORTABLE FOR HIM.
He's impulsive and not very clever, often failing to think things through before leaping to action.
He's NOT VERY TALL,
standing at roughly 4 foot nothing, which BOTHERS HIM IMMENSELY
though he'd never admit it.
Since he's from "some other plane of existence or whatever stupid nonsense floats your boat,"
as he'd say, he's usually only around due to being summoned via some kind of summoning ritual
. However, a sloppily-performed ritual can leave him more or less stranded here, which never fails to perturb him immensely.
When he does get to return to where he's from, though, his body regenerates over time, healing any corporeal wounds he might have suffered in performing his assigned task - from paper cuts to decapitation and dismemberment - whether he completes it successfully or not.
His summons mostly come from a "buncha wanna-be cultists" who have signed pacts with the agency that employs him.