Fenwick
From Muppet Wiki
Fenwick was an orange monster that Grover had spread Herry's alphabet secret to in an early Sesame Street sketch. Fenwick was hiding in a large paper bag throughout the skit.
Fenwick was later seen in a Grover sketch, getting into a boat with Herry and several other Anything Muppet monsters, and as a background singer in the original "C Is For Cookie."
