She gasps.

"M-Mister Yondu, you aren't really going to kill some of these people, are you?!" Maybe Madoka is taking it a little too seriously. And for a moment it seems like everything he's telling her is going right over her head - except maybe it's hitting its target after all, since Madoka momentarily doesn't seem so worried anymore about what she can or can't do.

Although she now instead may be worried about what he can do. Her hands are thoughtfully pressed to her mouth after the shock.