Ritsuko has an attack of conscience set to Lady Macbeth's solliloquy
Yet here’s a spot.

Out, damned spout! Out, I say!—One: two: why, then, ’tis time to do’t—fie, my lord, fie! A soldier, and afeared? What need we fear who knows it, when none can call our power to account?

What, will these hands ne’er be clean?—No more o’ that, my lord, no more o’ that: you mar all with this staring.

Here’s the smell of the blood still: all the perfumes of Arabia will not sweeten this little hand…

I am as foolish as my mother…