Bat Devil

Bat Devils (コウモリの悪魔, Kōmori no akuma) are Devils who resemble enormous humanoid bats.

Plot
Bat Devil in intro arc: In the past, he had taken Power's cat Meowy in order to make her get him a human. He had done this since a human had severely injured him by cutting off his right hand. Once Power leaves he stays in hiding in a house in the countryside.

In the present Power brings him Denji whose blood is used by the Bat Devil in order to regenerate. He says that it tastes disgusting and therefore eats both Power and Meowy. He then opens his wings and flies off to the city in order to eat more humans. Denji grabs onto his leg and turns into a Chainsaw Devil leading to a fight.

Both of them fight in the city streets causing damage to buildings and cars in the vicinity. The Bat Devil manages to put Denji out of his devil form after a strong attack. Denji quickly transforms back and cuts the Bat Devil into multiple pieces, and leaving his guts splayed on the streets in order to free Power and Meowy.

Abilities
Blood Consumption: Bat Devils can drink human blood to restore their energy.
 * Regeneration: So long as they are able to consume blood, Bat Devils can regenerate severe injuries including being able to regrow an entire arm.

Flight: Bat Devils are able to extend their wings and fly through the air despite their enormous size.