This orange pony seems to be the same as the purple medium-size unicorn pony from the Unicorn Family.
Uniquely, she has rooted bangs, tinsel hair, and a different style of eyes.
She came with several hair accessories in her thrift store bag, including a pink clip-in hair extension that looks quite cute on her.
Like the Unicorn Family, she has a red horn and a ribbon for her hair.
Here she is compared with the middle ponies from the Unicorn Family and Family Horse Playset.
You can see she bears quite a resemblance to both, but her hair extension and rooted bangs make her stand out!
She came alone, but may have originally come in a set like the other Family ponies.