Reze

Reze was briefly introduced in the season finale of Chainsaw Man, but we won't get to see her in action until the second season. In the manga, she is presented as a lovely young lady, too innocent-looking to ever do anyone any harm. Don't let her innocent appearance deceive you, though; she's one of the series' most formidable Devils.

In the latter episodes, it is revealed that Reze is actually the Bomb Devil, a Soviet agent in Japan. Her explosions can level adjacent structures and even automobiles. She was immune to the combined attacks of Shark Fiend and Denji.