Who is Jiyrayr Zorthian from Surely You're Joking, Mr. Feynman! and what is their importance?

Jiyrayr Zorthian is the artist, who teaches Feynman how to draw. Feynman attempts to teach Zorthian about physics, but this does not work out as well. Zorthian is among the few people Feynman personally selects to attend the reception thrown in honor of his Nobel prize.