To help me identify the specific magician and his assistant, could you please provide more information? For example:
* The full name of the magician: Is it "Johnathan" or something more specific, like "Johnathan the Great"?
* What kind of magic does he perform? This could help narrow down the possibilities.
* Where and when did you see him perform?
With more information, I can try to help you find the identity of the assistant.