Momon

Momon is a character who will play an important part in, most likely as the main antagonist. She dominates over the magical realm created by Bender's Dungeons & Dragons-related imagination. At some point she will become a dragon and battle Fry, who will also turn into a dragon. She may actually be Mom assuming an alter-ego in this realm, or she may be an alternate version of her created by Bender's imagination.

Trivia

 * Her name is a parody of Sauron, the Dark Lord of Middle Earth and title character of The Lord of the Rings.