the concept of this next gen universe is to take notable merchandise-exclusive ponies with interesting color schemes & designs and try to fit them all in as children of various pairings who might make sense as their parents
 
name: Prince Star Dreams  
parents: Twilight Sparkle, Sunset Shimmer, & Starlight Glimmer (all three are genetically his parents – yay magic!)  
siblings: Prince Flitterheart & Princess Dawn “Rainbow” Flash  
cousins: Princess Flurry Heart & Princess Skyla  
special talent: earth pony magic / growing and crossbreeding plants  
personality traits: quiet, soft-hearted, clever, distant, absent-minded
 
background:  
The first child of Twilight, Sunset, & Starlight, Star Dreams was magically made to be the genetic child of all three – but considering how much trouble they went through to get the spell working (with a result that looked fairly close to one of them, and not so much the other two), and how little they actually cared which child was genetically whose, he was the also the only child they would have with more than two genetic parents. Star Dreams grew up incredibly intrigued by how his earth pony magic worked, and in plants themselves; it was his own interest in herbs and their properties that helped lead to his younger sister Dawn Flash’s meddling in potion making. Nowadays, he helps her prepare her potions by providing home grown and foraged herbs, as he’s especially good at both discovering which herbs have the most magical properties and in crossbreeding plants to have new, interesting traits, magical or otherwise.