If Red were an animal, what animal would he be?
I would say a cat.
Cats are mysterious creatures, Red is a man of mystery.
Cats are independent and can be loners... so is Red.
A dominant cat can be assertive or aggressive toward other cats or pets in the house... Red can be assertive or aggressive toward other criminals who come onto his turf.
A cat can be friendly or affectionate toward family members or other people... Red can be friendly, affectionate, and caring to those in his organization or others in need.
Cats can be unpredictable with erratic shifts in mood... so can Red.
Cats can be active, curious and adventurous... Red has demonstrated these traits.
Cats always land on their feet... Red always overcomes his problems and lands on his feet.
Cats have superior night vision and hearing ranges... Red has informants and bugs throughout the world.
Cats have a small, lithe body built for speed and high precision jumping... Red tells Agnes that he's letting go of things to stay light on his feet.
He tells Agnes that he has nine houses... a cat has nine lives.
A homeless cat will eat what it finds on the street... a homeless Red in S10 is eating all the street food he can find.
Agnes describes Red as soft and cuddly.
There's a cat in Red's apartment.
I think it makes more sense that Red is a shape-shifting cat and not a body transitioning Kat.
Now I wonder if Tom Keen's dog, Hudson, shape-shifted into Arthur Hudson, so as to come back and metamorphically bite Red in the ass.