Spine

Parents: Spike & Thorax
Species: Dragonling (Dragon-Changeling)
Cutiemark: N/A
Special talent: Eating
Occupation: Weather prediction
Nickname(s): Eye-Spi, Spino

Personality:

Despite being the son of two ambassadors to other species, Spine is causes a surprising amount of trouble. Part dragon and part changeling, he has a stomach that seems bottomless and has a special places for gemstones that contain lots of love. Sometimes the hybrid has troubles controlling his hungry and it ends with livid or sobbing ponies mouring their lost jewelry. However, Spine also enjoy standard fare, and will follow his stomach wherever it takes him, whether that's the depths of the Everfree Forest or the reaches of Griffinstone. As a foal he often gave both of his parents quite a fright when he would suddenly disappear, only to be found gnawing found or stolen treat.

As expected, Spine is very carefree and lacks much sense of duty, but is quite friendly. Undeterred by his appearance or blood, bullying or teasing of any sort simply washes over him, to the disappointment of speaker. Stubborn or perhaps simply oblivious, Spine can be a hard one to get rid of if he decides to make a friend, even if they've decided THEY don't like HIM.

Trivia:

O Spine won't gain the colorful appearance of a transformed changeling due to being half-blooded (I headcanon all changelings are still born as black, buggy things until they find someone to 'share love' with, but half-bloods can't make the change, despite being born dark and bug-like).
O Can feel changes in the air with his 'antennae' allowing to him to predict weather changes, especially in places where it isn't planned and carried out by pegasi.