Sorry, I know I've been posting in this book a lot today. xD I just wanted to post one more thing. I've posted my drawings of Leo and Luna as teens separate, but I also have them together.

Leo takes more after Sans, while Luna is like Frisk. 

I would draw them as what they would look like now currently in the story, only being six years old, but I suck at drawing children. xD

So, this is them when they're both around 16 or 17 years of age.