At least he's cautious, okay. It's not his fault the vents in this building are rickety and occasionally collapse while certain ninja kids are crawling around in them.

"Thanks." Probably? He would have preferred a promise, but Heiji's a little too sharp for him to get away with that fib, so he supposes that's about the best he'll get. And as for the second part...

"I'm... mostly worried about Dove and Alfendi." Their lives could seriously be in danger if they were subject to Zero's punishments. It's only a mild relief to know that Heiji wouldn't hold it against him for voting to keep them safe over him; there are still so many pairs that could make it difficult to choose...