Esther, named during her later appearance on the Muppets Now episode "Socialized," first appeared as a senior citizen Whatnot during The Muppet Telethon opening theme in 2011's The Muppets.
She appeared again, in her spot as one of the "girls" during the different countries' Muppet Show opening themes, in Muppets Most Wanted in 2014.
Esther, still unnamed, in The Muppets (2011)
And in Spain
, in Muppets Most Wanted