Who are the characters that wake up in Shakespeare's A Midsummer Night's Dream, and what are their reactions to what happened during the night?

The characters who fall asleep in the forest in A Midsummer Night's Dream are as follows: Hermia, Helena, Demetrius, Lysander, and Nick Bottom. The young lovers are discovered by the wedding party the next morning; and once they are awakened by horns, Theseus asks the men why they aren't fighting each other. Lysander is the first to attempt to explain what happened as follows:

"My lord, I shall reply amazedly,

Half sleep, half waking; but...

The characters who fall asleep in the forest in A Midsummer Night's Dream are as follows: Hermia, Helena, Demetrius, Lysander, and Nick Bottom. The young lovers are discovered by the wedding party the next morning; and once they are awakened by horns, Theseus asks the men why they aren't fighting each other. Lysander is the first to attempt to explain what happened as follows:

"My lord, I shall reply amazedly,

Half sleep, half waking; but as yet, I swear,

I cannot truly say how I came here" (IV.1.146-148).

Once he thinks it through and wakes up a bit, he reveals that he and Hermia had planned to elope to Athens the night before. Egeus jumps to have Lysander arrested for taking his daughter without permission. Demetrius, however, explains that he went to the woods to catch the couple and says the following:

"But, my good lord, I wot not by what power--

But by some power it is--my love to Hermia,

Melted as is the snow, seems to me now

As the remembrance of an idle gaud" (I.i.164-167).

Demetrius then goes on to say that he loves Helena only now. Theseus decides to close the matter completely by inviting the young lovers to his house to get married along with him and Hippolyta. After he leaves, the lovers stand there asking each other if that just happened. They can't believe that the problem was solved so quickly and easily. 

Then Bottom wakes up slowly while calling out lines for his role as Pyramus. Once fully conscious, Bottom tries to verbally walk himself through what happened the night before, but he is mystified. He eventually declares:

"They eye of man hath not heard, the ear of man hath not seen, man's hand is not able to taste, his tongue to conceive, nor his heart to report, what my dream was" (IV.i.212-215).

None of the mortals can fully understand what happened the night before. It seems real to them, but because their rational minds can't explain how it happened, they pass it off as a dream.