The Tanaka-Mecha-Samurai is an in-world fictional hero admired by one of the main characters. They use the Tanaka-Mecha-Samurai as a sort of inner-monologue and person they look up to, giving this main character moral support during certain times in Chapter 2. Being a mecha, you may wish to use a robotic filter over your audition however this is not necessary as I can do this in production. As for the voice, please be creative with how you audition as I don't have too much of an outline for how I want them to sound so do what you feel is the best for them.