Another idea just popped in my mind today.
Instead of trying to find a beta reader, should I just write this story with Fischl being mute? I'll just simply write her doing certain things but not saying a single word, with Oz may or may not be getting the same treatment.
And then, once a chapter has been posted, I'll let you, the readers, to decide what should Fischl and Oz said during certain scenes in the story, and then I'll just edit the chapter later.
What do you think?