[Description from dA Source]  
Accidental Son/Daughter of Shining Armour and Chrysalis, and adopted son/daughter of Princess Cadence. Quasimodo (his first name came from Chrysalis, his last from Cadence) was conceived accidentally when Chrysalis was disguised as Cadence, and came as a surprise and terror for Chrysalis, as she was terrified that the love she had sucked from Shining Armour had become a hatchling queen, as that would spell her eventual doom, and as she was only 200 years old, she wasn’t ready to give up her life. The first live changeling birth cured her of that fear, for no egg was laid. However, when she looked at her sickly son, all she could see was Twilight Sparkle, and even beyond that, he was sickly and could not stand, his back legs not built for how many holes they had, being pony hooves, his structure couldn’t support a fragile limb. Chrysalis sent two nursery maids disguised and Crystal Empire guards, and dropped him onto throne, with a note in changeling “Take this Quasimodo.”  
He was found in the morning by Cadence, and she immediately took pity on him, bringing him to Shining Armour, who, while confused by Quasi’s existence, felt a paternal love for him. They adopted him, and built a wheelchair so he could walk. At first the Crystal Ponies were terrified and disgusted with him, but his attempts to win them over eventually won out, and he is the rightful heir to the Crystal Empire, though with both leaders immortal alicorns, its unlikely he’ll ever get the chance to rule.  
A shy, self loathing young boy (though he feels as though she is a girl inside, the makeup makes her/him feel less hollow) and wishes to please everypony, though she feels inadequate, her magic only good for powering the crystal heart, though it used to be that she would suck away love from her surroundings accidentally, her mother taught her how to channel love outwardly, instead of locking it away inside. Regality’s best friend, and cousin.