Cairax is fireproof, shrugs off shotguns and tasers, but not ALL scaly and also creepy

Cerberus shook her head. “That one’s down. Cairax killed her. St. George told me the story.”
“The demon guy? I thought he was an ex now.”
“He is, but he wasn’t then. She’s the one who bit him. Killing her’s one of the last things anyone saw him do.”
“How’d she bite him, anyway? I thought he was all scaly or something. Lizardy.”
“He’s fireproof. And tough enough to shrug off Tasers and shotguns.”
“So how’d she bite him?”
Cerberus pivoted her head, locking him in her sights. “He’s not all scaly.”
“What’s that supposed to—No!”
“Yeah.”
“You mean they … he … when she was dead?”
“I never met the guy, but Zzzap and St. George both say he was kind of messed up in the head, way past the whole magic-sorcerer thing. Multiple personalities or something. Didn’t always make the best decisions.”

Excerpt From Ex-Heroes, pg 204-205
Peter Clines
https://books.apple.com/us/book/ex-heroes/id585738407