Elliot Page Vanya Actor Cameron Britton Hazel Actor Tom Hopper Luther Actor David Castañeda Diego Actor Emmy Raver-Lampman Allison Actor Robert Sheehan Klaus Actor Aidan Gallagher Number Five Actor Colm Feore Sir Reginald Hargreeves Actor Adam Godley Pogo Voice Kate Walsh The Handler Actor Justin H. Min Ben Hargreeves Actor Ritu Arya Lila Pitts Actor Yusuf Gatewood Raymond Chestnut Actor Marin Ireland Sissy Actor Steve Blackman Executive Producer Jeff King Executive Producer Keith Goldberg Executive Producer Mike Richardson Executive Producer Gerard Way Writer, Executive Producer