these are my designs for Fluttershy and Rainbowdash respectively.  
I drew these a while ago and felt like sharing them. This is how I will draw them in my nextgen, which I’m currently doing my best to make atm  
 
Here’s the general idea for them:  
 
Flutter:  

• Married to Luna  
• Had to get her wings removed due to the excessive damage they took when she fell from cloudsdale as a filly, meaning she doesn’t fly with the butterflies like we see in the flashback episode.  
• Is the honorary aunt of rainbowdash’s kid  
• As tall as Luna  
   
  Rainbow:  
• Not with any pony  
• Wanted to make her not have a kid but I feel like she’d be an awesome single mother, so she shall have one child.  
• She often let’s her friends or some of the cmc watch her kiddo  
• Below average height