Is he some kind of slime? His eye and tongue don't look normal to me- Though that may just be my brain overanalyzing.
How does it feel to be absolutely correct?
Homicide Detective Peartree is indeed a Blood Slime. An artificial monster made and comprised entirely of various hemoglobin-just ingesting a bit of blood allows him to determine what type it is-which really helps narrow down the process a bit if it’s a rare blood type-and even if the person is healthy or not, tracking them down based on any abnormalities they may have via medical records
This is very helpful because DNA analysis didn’t fully occur until the 1980s. And his entire character concept is based on the John Mulaney joke of how easy it was to get away with murder in the 1920s-you can leave blood evidence everywhere and nobody knows what to do with it but mop it up. Well....with Detective Peartree, that is a THING OF THE PAST BABY! NO MORE GETTING AWAY WITH MURDER.
This is what his early slime form concept looked like. I haven’t updated it yet, but
Very alien isn’t he. He’s capable of changing the color of his body and shape shift flawlessly into a human form, making his disguise-*chef kiss*-EXCELLENT.