She is a gay robot, though. So it would be appropriate. Welcome, at this point. Shit.

"Yeah... I've had better." A sigh, definitely not imperceptible. "This thing in my chest? It's a bomb. It's a power source, but androids can set it to blow if they absolutely need to." She looks down, between her feet. "It's what No.4 did. A2 didn't see it happen, but she knew."

That's a hell of a way to solve that mystery.