Yep, another stupid doodle based thing from me. But, there's a sprite thrown in!
This is Cinnabum Brownie, a changeling pony who was swapped with a kidnapped foal at birth and who genuinely prefers being with ponies than her own kind because there's always honest love to be had in her household and the alternative to her feeding style is breaking ponies poor little hearts, which is mean. She's bright and bubbly on the outside, but deep inside she's very self-conscious and insecure about what ponies think of her - even though everypony generally likes her thanks to her optimism and niceness. Her greatest fear in life is that her 'adoptive' parents find out that she isn't really their child and disown her.
While growing up she discovered that she was actually a pretty good baker, so she gave herself a cutiemark for the novelty of it - a heart made of icing being sprinkled with cinnamon.
She's slightly chubby (from all the love), has freckles from actual sun damage, small buck-teeth, and dreams of some day finding a nice, handsome, strong stud to hold her close at night and feed her his true unrequited love while she lays eggs in his stomach and snuggles with him in the months before their foals hatch and consume him alive.
Then she realizes no sane colt in the world would want that and it makes her sad.
She can suffer from very short periods of moodiness and depression, because being happy all the time is emotionally exhausting for anyone - and love sucking fairy bugs are no exception.