And the ship was enveloping us this entire time, you know. Such a horrific being. Who's to say we're not still inside something?

There are devils that can resurrect themselves from as little as a fingertip. Or can share their consciousness with another devil, even after their entire body is blown to shreds, as long as that fellow devil drank the blood that was spilt. And humans who take a devil inside them as their heart, like Chainsaw Man, who are the strongest fighters we have...

[Makima gives Kira a little glance. With her force of will, it's easy for Brain to assume that she's simply meeting Kira's jealousy.]

Then the human and devil can commune in a mental realm from their precious memories.

If we're in there, I can understand the caution.