Fifi is the troop leader of a group of Fireside Girls from Canada. She is the only one that speaks English, while the others only speak French. She only appears in Phineas and Ferb's Chirstmas wish where she offers Phineas, Ferb, and some Fireside Girls from America some of their motor oil. She is voiced by Tress MacNellie, who also voices Buttons and Katie's mother. This article is a . You can help My English Wiki by expanding it.