When Harry teaches Holly the Patronus Charm she isn't too shock to find out that hers is as a badger. It was almost perfect in a way coming from the house of badgers to find out her Patronus was one.
She was loyal to Harry as a friend and as a sister. Always willing to stand by him and not worry about what those think of him or herself. She was also often misunderstood by those around her it didn't help that most of the time she warmed them of a future yet to come. And, no matter the foe she faces she will always challenge them with her head held up high so yes, she found the badger fitting.
She smiled as Harry, stag patronus stood beside her badger just how she stood beside Harry.