Macbeth- The red, bleeding mess, after Macbeth has un-seemed the bloody man.
Lady Macbeth- The woman Lady Macbeth, has heart like no other, and is ready to have a war to the death.

Night- dark, scary, cool, moon, stars, spooky, black, twilight, constellations, sleep, pitch dar, hard to see, sundown, gloomy, and night fall

Lady Macbeth is a woman who has heart and is ambitious to be queen. She really wants Duncan to commit to his death, and everything would be perfect.  You can say it's killing her inside, that Macbeth, and herself are not king and queen.