Sometimes it's not even necessary. The name is only fitting.
I love it so much. Twily, peacefully sleeping... I'd have given her a hug, but I don't want to interrupt her dreams, particularly when she looks so lovely. Owlowicious sleeping as well is a nice (big) detail that only adds to the peaceful, calm beauty of it all. And of course, the detail here is awesome. I really like all the little lines in Twily's mane, and the lines of the wood of the table, but particularly I approve of the quill here. It's just awesome, the way you managed to reflect the structure and surface of a feather shimmering in candlelight. So awesome.
Since when Twilight's wasting time sleeping, when there's so much studying to do? A pretty sweet drawing; few people actually remember Owlicious (or however you spell his/her name ^^'), so it is unique in its own way. Good job.