For the ever-popular Anonymous, Fain might be said to be contagious in the sense that he corrupts those he is around long enough, but not in the sense that they then have something communicable. As for his influence over people, remember that Fain is now an amalgam of Fain and Mordeth, and Mordeth was a counselor, quite accustomed to and skilled in gaining the ears of the mighty.
And yes, Amico Nagoyin was Yellow, and Berylla Naron Blue.
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