Sue Sims, aka Gertrude Robinson for producer Rusty Quill's most popular The Magnus Archives Podcast makes an audio-only cameo during the trial in Episode 26.
Casting Gag: Ben Meredith (David-7) also plays Elias Bouchard in The Magnus Archives. In a parody crossover episode, Trexel mentions a character who looks like David menacingly approaching with a length of pipe.
I.M.O.G.E.N. is named for her voice actor, Imogen Harris. Similarly, A.L.E.X. is named for his, Alexander J. Newell.