Television Without Pity posters, at least, seem to have settled on Emanda for the main character, a portmanteau of her real name Amanda and her assumed identity as Emily.
And now there's Amily for the original Emily Thorne, who Amanda switched identities with.
Fauxmanda is frequently used as well (even by the show's composer in his track titles).
There's also Count Dogula for the seemingly immortal yellow lab.
Sammy The Immortal Dog was another.
The Other Darrin: Satoshi Takeda was played by Hiroyuki Sanada in season 1 and Cary-Hiroyuki Tagawa in season 2.
The Other Marty: Marc Blucas originally played Emily/Amanda's father in the Pilot but had to be recast when his commitment to Necessary Roughness made him unavailable for the number of episodes ABC wanted him for. James Tupper stepped into the role instead.