The song suits this picture here, so why not? Characters belong to LaughingDeathWolf that's all I'm going to say. That and if you attempt to steal the characters I will find you, and I will kill you. (Not really, just don't steal the characters)

Hearts: The first one is Deann Beann, her specialty is welding and she is the daughter of Fluttershy and Discord. She is more like her father, but has parts of Fluttershy's caring personality. She once was mistaken for a boy...*cough* Callibrium *cough*

Diamonds: That's Prince Callibrium, son of Celestia and Sombra. He shows pretty much no feeling at all. Usually.... He only defends his sister and eventually Deann.

Spades: Princess Leonora, Leo on occasion. She is the twin of Callibrium and has no horn due to it being torn from her head so she wears a necklace which gives off the same power as a horn given by her childhood friend.

Clover: Last but not least, Domino. He is the elder (adoptive) brother of Deann. He has more Fluttershy's personality than Discords. He cares deeply for his sister and everyone around him.

Their bottom halves are the things they don't want to be: Heartless, Powerless/Helpless, Royalty, a Monster.

From LD's DeviantART, just wanted to put it up, shush LaughingDeathWolf !