Bramble is one of the Pussywillow Pixies wearing only shades of green. She was not directly named until Papa's Worry Warts in Season 4.
She and her fellow pixies first met the Smurfs when Clumsy was accidentally taken into the hollow by a deer crossing Toad River. With the Smurfs' help, Pansy freed her fellow pixies from the Wartmongers and continue to live in the hollow, meeting the Smurfs from time to time ever since.