Nearly all villains Luffy has face or the villains of arcs have been mostly based off animals. While not all are animals the majority are.
Arlong-Saw tooth Shark
Smoker-Not being counted
Crocodile- Is named Crocodile
Rob Lucci-Has Leopard...
How do we define who is a tyrant and who is evil, or even lawful evilness? The topic does intrigue many of us, doesn't it?
Looking at the definition in the dictionary, it says tyranny is:
a state under cruel and oppressive government.
rule by one who has absolute power without legal right...
I feel like that there would be more than just sky island when it comes to enel, I feel like him and his bizzare devil fruit will come back in the new world, though he's probably one of luffy easiest enemy....