-Friedrich accept the proposition and become temporarily another person (he just change his appearance and Shrift and probably his demeanor as it's another soul directly in collision with him) and you choose as whom he will go(I'll take the most upvoted comms, you propose and you vote isn't it wonderful ?)
"I hope you will be a good test subject. My first guinea pig." The young man in white smiled, and casually removed the square-rimmed glasses above the bridge of his nose that revealed a strong scholarly temperament.