Lucy Heavens Helen Creator, Voice, Executive Producer Nic Smal Principal Secretary Creator, Voice, Executive Producer Kimiko Glenn Kiff Voice Michael Croner Barry Voice Tom Kenny Trevor Angstrom Voice Mary Mack Renée du Bedat Voice Kate Flannery Agnes Voice Kent Osborne Dr. Lyon Voice Antonio Canobbio Executive Producer Ben Kalina Executive Producer Chris Prynoski Executive Producer Shannon Prynoski Executive Producer