Her vocal talents have enabled her to voice a wide variety of characters of all ages, from Fifi La Fume and Little Sneezer in Tiny Toon Adventures, to Dexter's mother in the popular cartoon Dexter's Laboratory, Grace in Bruno the Kid, Janine Melnitz in The Real Ghostbusters, Linka from Captain Planet and the Planeteers, Myriam Pataki (Helga's mother) in Hey Arnold!, Betty Quinlan from The Adventures of Jimmy Neutron: Boy Genius, and the title character in the UK dub of the anime Shin-chan. In addition to these more prominent roles, Soucie has an extensive list of other voice credits to her name, spanning some twenty years and featuring a great variety of roles. As is often the case with voice actors, the ambiguous and supplementary credit "Additional Voices" appears several times in her filmography and this may refer to her voicing not just one, but several very minor characters in one particular piece of work, depending upon demand.