10
1
The Eternity Devil can manipulate time in certain places. Time does not move wherever it resides.
2
As it attacks using typhoons, its area of damage is so wide that its attacks affect not only its enemy but also civilians.
3
Akane has a contract with the Snake Devil. It has the ability to absorb living things.
4
Mysteries surround her. Since we cannot measure her true power, it is safe to give her a lower ranking until further information is given.
5
Be it strength or an outstanding swimming ability (even on land!), he has it all. His crazy endurance also makes him difficult to handle.
6
She is the Spider Fiend. Personality-wise, there is not much to say about her.
7
Her Ghost Devil is indeed immensely powerful. It can vanish, thus being able to attack swiftly without being seen or touched.
8
His strength is absolutely brutal, with him being able to destroy almost everything with a single punch or kick.
9
Katana Man is far from weak. In fact, he is the first villain who managed to push Denji beyond his limits.
10
As a Blood Fiend, Power has the ability to manipulate blood as she wishes.