Why yes, I do have a fanpony/ponysona.
Philologia is an unicorn archivist with a stumpy horn. Her special talent is finding information. Her horn doesn’t allow for magic out, so her magic is internal and assists her in locating documents and materials in the archive.
She has a tentative friendship with Princess Luna, based entirely on the fact that she runs the archives and Princess Luna has a lot of history to catch up on. Princess Luna charms her hair, which helps keep it out of her way while she works.
Philologia has a pet chicken.