I suggest to organize Species
and Body Type
similar like the Gender traits. Species should be the nature of a character while Body Type is the physical shape.
Typical species
would be: Human, Robot, Demon, God, Extraterrestrial, Feline, Kemonomimi
Typical Body Types
would be: Human, Cat, Lion, Tiger, Dog, Dragon, Fish
The combination of those two traits defines the species of the character like physical and mental gender define the gender:
A human is Human-Human. An android is Robot-Human. Superman is Extraterrestial-Human. A Cat is Feline-Cat. A Catdemon is Demon-cat. A Neko is Kemonomimi-Cat. A Lion is Feline-Lion.
The "nature" is defined by "Species" and combined with the "physical shape", the "Body Type".
"Nature" means all characteristics of a species except the body shape. A cat is an animal made of flesh and bones, has cat-senses, says 'meow', walks on all fours, loves milk and fish, moves with catlike elegance. This altogether is the species or nature of a cat. A human with a human body who acts, sees, feels like a cat would be species:cat and body:human. A cat in a human body similar like a transgender is a woman in a male body.